I got a-c wrong. Please show me the right answers. (calculus problem). Please show all work

t The balance A (in dollars) in a savings account is given by A = 4000:9037 , where tis measured in years. Find the rate at which the balance is changing when t = 1 year, t = 10 years, and t = 50 years. (Round your answers to two decimal places.) (a) t = 1 year $ 4290.03 X peryear (b) t = 10 years 3; 8055.01 x peryear (c) t = 50 years 3; 13246180 x peryear