Consider the following sets of investment projects:

$\backslash$table$[[$Project Cash Flow $($$$)],[n,$A$,$B$,$C$,$D$,$E$,],[0,-100,-100,,-200,-50,],[1,60,70,20,120,-100,],[2,900,70,10,40,-50,],[3,,40,5,40,0,],[4,,40,-180,-20,150,],[5,,,60,40,150,],[6,,,50,30,100,],[7,,,40,,100,],[8,,,30,,,],[9,,,20,,,],[10,,,10,,,]]$

$($a$)$ Classify each project as either simple or non simple

$($b$)$ Compute $i^{**}$ for A using quadratic equation