k! 3.4 (a) Use a while-end loop in a script file to calculate the sum of the first n terms of the series: (5k+k?). Store all the first n reslts in an array y, and let n = 20. Show your code and the array y. (b) Use a for-end loop in a script file to calculate the sum of the first n terms of the series: (k k). Store all the first n reslts in an array y, and let n = 15. Show your code and the array y