need help answering these!

MORE TVM PROBLEMS TO WORK: 1. Xenon stock was selling for $17.00 at the end of 1991. By the end of 2015, the price of the stock had risen to $86.25. At what annual rate has the price of Xenon stock appreciated? [7] 2. Josh Williams is saving money to buy a new car. Josh wishes to pay cash for the car three years from now. The car currently costs $20,000 and the price is expected to increase by 5% per year for each of the next years. Josh currently owns a car that is worth $10,000 and is expected to decrease in value by 12% annually. If Josh trades his current car in on the new car in three years, how much money should be deposited today in an account paying 10% annually in order to have enough money to buy the car in 3 years? ($12,274.82] 3. Continental Life is offering an insurance policy under either of the following payment plans: (a) make a series of twelve $1,200 payments at the beginning of each of the next 12 years the first payment being made today), or (b) make a lump sum payment of $10,000 (today) and receive coverage for the next 12 years. If you have investment opportunities offering a 9% annual return, which payment alternative would you prefer? (Alternative (a) is better by $633.77 in PV dollars]