help with question 5

PMT, FV, AMORT) to solve questions whenever possible. 1. Katrina contributed $2,500 at the end of every year into an RRSP for 10 years. What nominal annual rate of interest will the RRSP earn if the balance in Katrina's account just after she made her last contribution was $33,600 ? (5 marks) 2. An RRIF with a beginning balance of $21,000 earns interest at 10% compounded quarterly. If withdrawals of $3,485 are made at the beginning of every three months, starting eight years from now, how long will the RRIF last? (5 marks) 3. For how long must contributions of $2,000 be made at the end of each year to accumulate to $100,000 at 6% compounded quarterly? (5 marks) 4. Eduardo Martinez has saved $125,000. If he withdraws $1,250 at the beginning of every month and interest is 4.5% compounded monthly, what is the size of the last