Need in Steps detail please!

Question 2

One year ago, Sondra opened an investment account paying 7.65 percent annually. She made an initial deposit of $3,000. Her goal is to have $5,000 in the account three years from today. This afternoon, she realized that she may not have deposited sufficient funds to reach her goal. How much more, if any, should she deposit into her account to ensure that she reaches her goal in three more years?

Question 3

On the day you entered college you borrowed $25,000 from your local bank. The terms of the loan include an interest rate of 4.75 percent. The terms stipulate that the principal is due in full one year after you graduate. Interest is to be paid annually at the end of each year. Assume that your complete college in four years. How much total interest will you pay on this loan?

Question 4

Using an 8% discount rate, what is the present value of a perpetuity of $975 a year starting at time 5?