please answer part a and b

2. A small oil company considers the continuous pumping of oil from a well as an income stream, generating income at the rate of r(t) = 600,000 dollars per year. The prevailing interest rate is 20% per year compounded continuously. Dobrambo arsinu od obale a. Find the total accumulated value of the income stream at the end of 10 years. b. Find the present value of the income stream