You perform a sensitivity analysis to identify the critical variable$($s$)$ in your analysis of a project. You run the analysis and obtain the following information on three variables, i$.$e$.,$ the sales growth rate, variable cost per unit, and cost of capital.Which one is the most critical? Which one is the least critical? Explain and justify your answers.$\backslash$table$[[$Variable$,$Sales Growth Rate,VC $($Variable Cost$)$ per Unit,Cost of Capital$],[$Original NPV$,$$$20,000,$$$20,000,$$$20,000$