Problem $6(20$ points$)$: Back to Allison Tate's decision in the HBR case. Now you are the newly hired analyst, and Tate would like to examine her decision's sensitivity$.$ a$.$ Suppose she wants to examine the impact of sales when the market $($and research$)$ is favorable on EMV. Can you enhance the model you built earlier in PrecisionTree to conduct a one$-$way sensitivity analysis for the range from $350$ to $950($currently$,800)$ and describe what you find? b$.$ She also wants to know whether her decision is sensitive to the chance of the market $($and research$)$ being favorable $($currently$,$ it is estimated at $40\%).$ In other words, should she change her decision if the chance is extremely high or low $($e$.$g$.,20\backslash \%$ or $90\backslash \%)?$ Again, use sensitivity analysis to find this out for her.