Please provide explanation using formulas and Excel

Aidan wants to start their own art atelier. In her long term plan, she is going to invest $10,000.00 for the first 15 years, and 35,000.00 for the next five. Considering a 5% interest rate, and according a consulting firm projection, the atelier will cost around $350,000.00 in year 20. Are they going to have enough money? If so, how much extra money are they going to have? (c) If not, how short are they going to be?