An account grows at an annual interest rate of r⁡ ⁣, so it grows by a factor of x=1+r⁡ ⁣⁣ ⁡ each year. The function A(x)=800x 4 +350x 3 +500x 2 +600x⁣ ⁡ gives the amount in the account after 4 years when the growth factor is x⁡ ⁣⁣ ⁡. What is the total amount in the account if the interest rate for the account is 3% each year? How much money was put into the account at the beginning? After 5 years, $200 is added to the account. Use the expression B(x) that represents how much is in the account after 5 years.