please help number 5 and 6

5. Smith invests 100,000 in a 180-day short term guaranteed investment certificate at a bank, based on simple interest at annual rate 7.5%. After 120 days, interest rates have risen to 9% and Smith would like to redeem the certificate early and reinvest in a 60-day certificate at the higher rate. In order for there to be no advantage in redeeming early and reinvesting at the higher rate, what early redemption penalty (from the accumulated book value of the investment certificate to time 120 days) should the bank charge at the time of early redemption? (1 year = 365 days). 6. Bob puts 10,000 into a bank account that has monthly compounding with interest credited at the end of each month. The monthly interest rate is 1% for the first 3 months of the account and after that the monthly interest rate is 0.75%. Find the balance in Bob's account at the end of 12 months just after interest has been credited. Find the average compound monthly on Bob's account for the 12 month period