(a) An individual sets up an investment plan in January 2020 and intends to contribute 5% of his monthly salary at the end of every month. If his monthly salary is $70,000, and he expects a salary increase of 3% every year in January and an effective annual rate of return of 6% from the investment plan (investment return will be credited to his investment account at the end of every month), calculate the accumulated value after 5 years. (b) If the individual ceases to contribute after 5 years but leaves the accumulated fund in the investment account, such that it remains invested and continues to earn the same rate of investment return as before, calculate the accumulated value after a further 3 years