How do you tackle this problem.

Determine the value of x, for a company's two investment alternatives to be equivalent at an interest rate of 3% per year: Option 1. Invest $25 at the end of the rst year. Starting from the end of 2-th(nd/rd/st) year, the company gets sales of $x for 4 years, followed by $2.9x for 7 years, and $x for 4 years. Option 2. Invest $25 at year 0, and the company starts to get sales $25 at the end of year 7, increment by 1 cumulatively until at the end of year 13 (e.g., at end of year 8 is 26)