A Company Wants to Use PERT to Manage a Project $\le$

A company wants to use PERT to manage a project. They have developed the following spreadsheet for the problem. If The Risk Solver Platform (RSP) is used, what formula should go in cell F3 of the spreadsheet to compute the Activity Time when simulating a PERT analysis?

A) =IF(E3 $\le$ (C3-E3) /(D3-B3) ,D3-SQRT((D3-B3) *(D3-C3) *(1-E3) ) ,B3+SQRT((D3-E3) *(C3-B3) *E3) )
B) =IF(E3 $\le$ 0(D3-B3) /(C3-E3) ,B3+SQRT((D3-E3) *(C3-B3) *E3) ,D3-SQRT((D3-B3) *(D3-C3) *(1-E3) ) )
C) =IF(E3 $\le$ (C3-E3) /(D3-B3) ,B3-SQRT((D3-E3) *(C3-B3) *E3) ,D3+SQRT((D3-B3) *(D3-C3) *(1-E3) ) )
D) =PsiTriangular(B3,C3,D3)