Write C code that does the following: 1. Numerically compute the following series 1 1 1 A 1-5+ 5-5+.. = a + t. and approximate n. Vary iteration numbers. Note that the general term, an, is expressed as (1)n+1 an = 2n-1 2. Create your own C function named MyFunction() which accepts an integer n from the keyboard and returns: 5n + 13. Show the result for n =10. Show function prototype and function definition (refer lecture notes). Your program must follow the format shown below. 1/function prototype main() /Prompt user to input a number //Accept input from user //Call MyFunction() //print value returned by MyFunction() 3. A sequence an is given with the following rule: An+2 = 2 an+1 + 3 an, ao = 2, Write a C program to compute a17. aj =-1