Question 3: (30 points) Use induction to prove each of the following: (b) Sum of squares: 5%-n(n + 1)(2n + 1) (c) Geometric series sum, a 1: an+1 2(n 1)an+i -o (a - 1)2 (e) for all n > 0, 8n+2 + 92n+1 is divisible by 73