An author is to be paid royalties for publishing a book. She has two options: She can be paid $21,000 immediately, or she can receive 5 equal annual payments of $4600, with the first payment taking place immediately. Assuming that the annual interest rate is 6% compounded annually, which option should she choose? You must justify your answer in order to receive full credit. You have a continuous income stream with an income rate of $1000t dollars per year for 4 years. Assume an interest rate of 5%, compounded continuously. Calculate the present value of this income stream.