dnt solve it by Excel program ,, please solve it by hand show me formulas to make me able to understand it,, if you are not able to solve it by hand dont solve it please i dont want to lose a question without gitting a usefull answer,

Consider the following business, if ii = 12% and ib = 8% and the MARR is 15% would you invest in the following business: Use MIRR method 0 1 2 3 7 4 5 6 8 9 10 11 CF -200 -200 380 380 380 380 -200 -200 -200-200 -200 -200