my grand daughter recently graduated college at age $20$ with an engineering degree. Her Starting salary is $$90$k$.$ She just set up a budget and plans to invest $20\%$ of her gross salary per year. Assume she can earn $15\%$ per year. Two Part: A$.$ How many years before she will have a million dollars? $($ignore taxes$)$ B$.$ How much money will she have when she retires at age $50?$