6. A credit union entered a lease contract valued at $7700. The contract provides for payments at the end of each quarter for 4 years. If interest is 6% compounded quarterly, what is the size of the quarterly payment? 4. To finance a vacation in 4 years, Elsie saves $150 at the beginning of every month in an account paying interest at 14% compounded monthly. (a) What will be the balance in her account when she takes the vacation? (b) How much of the balance will be interest? (c) If she waits an additional year to start her vacation, and continues to save the sam amount of money, how much more money does she have to spend? ame