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+//1. Write a function 'getBirthday' which takes in an object with year, day, and month properties, and returns a string with the month and day separated by a space.
+
+var getBirthday = function(obj) {      //created function get b-day that takes in an obj
+    return obj.month + " " + obj.day;  //expression that concatentates obj month and day
+}
+
+//Sample input:
+var birthdayA = {
+    year: 2010, 
+    day: 19, 
+    month: "September"
+};
+var birthdayB = {
+    year: 1950, 
+    day: 20, 
+    month: "December"
+};
+
+getBirthday(birthdayA); //"September 19"  // call getBirthday function passing in argument B-day A object
+// getBirthday(birthdayB); //"December 20"
+
+
+/*2. Write a function which accepts an array of numbers and a target number. 
+This function should return a new array of all numbers from the input array 
+which are less than or equal to the input target number.*/
+
+
+var getNumbersLessThan = function(numbersArr, targetNum) {
+    var newArray = [];
+    for (var i = 0; i < numbersArr.length; i ++) {
+        if(numbersArr[i] <= targetNum) {
+            newArray.push(numbersArr[i]);
+        }
+    }
+    return newArray;
+}
+var inputArray = [10, 22, 24, 19, 4, 25];
+//var inputTargetNumA = 25;
+var inputTargetNumB = 10;
+
+var output = getNumbersLessThan(inputArray, inputTargetNumB); //for A [10, 22, 24, 25]
+//getNumbersLessThan(inputArray, inputTargetNumB); // for B[10, 4]
+console.log(output);
+
+
+/*3. You are asked by the head of Human Resources to compile a list of birthdays 
+in a given month. Write a function which accepts an array with a structure similar 
+to "birthdayCollection", as well as a month. Name this function "birthdaysInMonth"; 
+it should return an array of strings with a Month and Day separated by a white space.
+
+o:  a new array with Month and Day for all elements within the birthday Month provided
+i:  an array of objects, need to go through each object's elements
+*/
+var birthdayCollection = [ 
+    { year: 1982, day: 10, month: 'February' },
+    { year: 1966, day: 22, month: 'March' },
+    { year: 2008, day: 19, month: 'December' },
+    { year: 1963, day: 3, month: 'March' },
+    { year: 2000, day: 7, month: 'February' },
+    { year: 1977, day: 18, month: 'February' } 
+];
+
+var birthdaysInMonth = function(birthdayObjs, birthdayMonth) {
+    var newBirthdayArray = [];
+    for (var i = 0; i < birthdayObjs.length; i ++) { 
+        if (birthdayObjs[i].month === birthdayMonth) {
+            newBirthdayArray.push(birthdayObjs[i].month + " " + birthdayCollection[i].day)
+        }
+    }
+    return newBirthdayArray;
+}
+var output = birthdaysInMonth(birthdayCollection, "February"); //[ 'February 10', 'February 7', 'February 18' ]
+console.log(output);
+
+//4. write a function that takes in two integers and computes the sum between them
+var computeSumBetween = (num1, num2) => {  //function that takes in two integrers
+    if (num1 > num2) {                     //addressing exception where num1 is greater than two
+        return 0;
+    }
+    let sum = 0;                           //est. var sum to store total while looping thru delta btw nums
+    for (let i = num1; i < num2; i++) {
+        sum += i;
+    }
+    return sum;
+};
+
+var output = computeSumBetween(2,5);        //calling function and passing in arguments (two integers)
+console.log(output);