must use excel, please show work and equations

Nike makes an impact on promising communities by donating money to build basketball courts. Recently, they donated $5 million to the Obama Presidential Center for public courts with the new facility. Nike is predicting that LeBron will retire in 4 years. Once he retires they expect 3 years until he decides to build a public park in Akron. Nike will then donate $5 Million to Lebron in the first year and $100,000 for maintenance for the following 8 years. How much should Nike invest per year (all money will be invested prior to his retirement) in order to be able to donate those funds when they are needed? The return on investment is set at 7% by their financial advisor. Round to two decimal places