I need help with the following Discrete problem. Please show your work, thank you!

4. Use mathematical induction to prove that the statements in Exercises a and bare true for every positive integer n. a. 22+42+..+(2n)2 = [2n(n+1)(2n+1)] /3 b. Prove that for all integers m and n, if m and m-n are odd, then n is even