24. Given the first payment is P, and payment increasing by Q thereafter, continuing for n or infinite years and i=6%, as shown in the figure below. P P+QP+2Q P+3Q P+(n-1) 1 0 1 2 3 n years P.V. = 2 Find the P.V. of the annuity at one year before the first payment, when P = n, Q = -12 a) (Da). b) (D), c) n(Da), d) 2(Da), 25. When P-625, Q =25, n = 20, $20--%% -45.762, find the A.V. of the annuity at the last Payment, (IAV)20-*-_a) 33562 b) 34256 c) 35626 d) 36652 26. What is the PRESENT VALUE in past three years to have a return of $800 at an effective rate of the investment i obtained in item 36 a) 800(1+1) b) 800(1+d)" c) 800(1 + 8)' d) 800(1 + v)