Please solve both parts.

Question No.4 a) What sum must be deposited today at 10% per year compounded quarterly if a goal is to have a compound amount of $50,000, 6 years from today? How much interest will be earned during this period? b) Mr. Mohammad Ali has received a job offer from a large investment bank as an accountant. His base salary will be $35,000 constant to date of retirement. He will receive his rst annual salary payment one year from the day he begins to work. In addition, he will get an immediate $10,000 bonus for joining the company. Mr. Ali is expected to work for 25 years. What is the present value of the offer if the discount rate is 12 percent