i need step by step and formulas

-5833 9. After graduation, you plan to work for Dynamo Corporation for 12 years and then start your own business. You expect to save and deposit $7,500 a year for the first 6 years (t = 1 through t 6) and $15,000 annually for the following 6 years (t = 7 through t= 12). The first deposit will be made a year from today. In addition, your grandfather just gave you a $25,000 graduation gift which you will deposit immediately (t=0). If the account earns 9% compounded annually, how much will you have when you start your business 12 years from now