The language is in C. Please help. Thanks!

(20 pts) Write a C function to test whether a given year is a leap year or not. The function should return 1 if it is a leap year, otherwise, the function returns 0 . Then write a C program to call this function to list all leap years from BC 0 to year 2023. Submit your C code and a screenshot of the output of the list of the leap years. (20 pts) Write a function negate a given integer variable (note: you need to use pointers). Then write a program to call this function to negate the following three integers: 48,2023, and 0. Print out the results . Submit your C code and a screenshot of the outputs