use excel to solve $11\mathrm{.}02-$PR$002$ You have been asked to perform a sensitivity analysis on a company$$s plan to modernize its facilities to determine the impact of possible errors in estimating the net annual savings. The initial investment in the modernization is $$30,000.$ The expected net annual savings are $$13,000.$ The salvage value is $$7,000$ after a planning horizon of $7$ years. MARR is $12\%$ per year.

Determine if the modernization is economically attractive based on the initial estimates and an annual worth $($AW$)$ analysis.

Determine the AW if the net annual savings change by the following percentages from the initial estimate: $80\%,60\%,40\%,20\%,+20\%,+40\%.$

Determine the percentage change in net annual savings that causes a reversal in the decision regarding the attractiveness of the project.