Write down the function body of the two following C functions. Function adder should add together the two integer values that the pointers x and y points to, and then write the result to where z points to. Function foo should use function adder to add together a and k and then return the resulting value. For instance, if expression foo (7) is executed, value 17 should be returned. Your solution: void adder (const int *x, const int *y, int *z) ( int foo (int a) f const int k = 10