can you explain in detail how the answers were given in the pvif @ 12.5% section

F G Year 0 800 00 vu A WNA 20 nm + nunca SMS C D E iiiii i vv iv*iii Cumulative cash PVIF @ present Cash flow flow 12.5% value -3000 -3000 1.0000 (3,000.0) 740 -2260 0.8889 657.8 740 -1520 0.7901 584.7 740 -780 0.7023 519.7 0.6243 499.4 500 520 0.5549 277.5 500 1020 0.4933 246.6 500 1520 0.4385 219.2 500 2020 0.3897 194.9 199.8 Payback period = =3+(780/800) NPV (@ 12.5%) = 199.8 PL = (3000+199.8)/3000 1.07 IRR = EIRR(B3:B11) 14.59% 3.98 year 12 Total 13 Ans 31 14 Ans 32 15 Ans 33 16 Ans 34