Can someone help with this i need understand it step by step please

Select the preferred alternative using ATCF-Present Worth(PW) using incremental analysis method after recognition of inflation (f = 4%).Tax rate 40% MARR ATCF = 10% assume actual cash flows are in real dollars (R$))(base = 0) AS_1 = R$_K(F/P, f, k minus b) = R$_K(1 plus f)^(k minus b) depreciation method: MACRS(GDS) Find the ATCF for the alternatives using A$ cash flows, them evaluate all alternatives on ATCF using incremental analysis PW incremental analysis deltaPW_B minus A(10%) =