Formulate and solve a spreadsheet model for this problem. Then use Solver's sensitivity report to find the allowable range for the unit profit of each activity. a. Determine the number of units of each activity to undertake. Note: If an allowable increase/decrease is 10,000 or larger, simply enter 10,000 . Round "Allowable Increase - Solution Activity 1" answer to 1 decimal place. Round "Allowable Decrease - Solution Activity 1" answer to 2 decimal places. b. Determine the total profit