please help me solve these problems and show all the work. thanks

8. You are offered an investment that will pay you $200 in one year, $400 the next year. 50 year, and $800 at the end of the fourth year. You can earn 12 percent on very similar in the most you should pay for this one? in one year, $400 the next year, S600 the next am 12 percent on very similar investments. What is 9. A bank is offering 12 percent compounded quarterly. If you put $100 in an account, how much will you have at the end of one year? What's the EAR? How much will you have at the end of two years? You estimate that you will need about $80,000 to send your child to college in eight years. You have about $35,000 now. If you can earn 20 percent per year, will you make it