Show using SHORTHAND ECONOMIC FORM the value of the value at time 0 of the following cash flows (use A and G wherever possible to reduce the number of terms). YEAR Amount 400 500 600 500 Select one: a.P 400(PIA, i, 5) + 100PG, i, 3) + 500(PF, i,4) O b. P = 400(PIA i, 5) + 600(PG" i, 3) + 100(PF, i , 4) O cPa 100(P/A, i, 5) + 400(PG i, 5) + 100PF, , 4) O d. P 400(P/A, i, 5) + 100(P/G, I, 3)+ 100(PIF,i,4)