The University Times newspaper costs $625 for a single, 3-year subscription. The newspaper is published 252 d per year (5 d per week, except holidays). If an 8.5% nominal interest with compounding every 2 months is used:

a) What is the effective annual interest rate in this problem?

b) Compute the equivalent interest rate per copy (i.e. when m = 252).

c) What is the subscribers cost per copy of the newspaper, taking interest into account?