please send answers asap

Information for Part C Questions Two sources of income with equal present values C at time 0 provide annual payments in arrears during 10 years. The first product, i.e. Product 1, pays 50, 000 - 2, 000k, where k is measured in years, and the second product, i.e. Product 2 pays a constant annual amount of b. The present values are calculated using a force of interest of 6(t) = 0.05 - 0.002t, where t is measured in years. Derive a general expression for the present value of each income stream in function of k, C' and b and without integrals