9Estimates for a construction project appear in the following table: Dear optimistic most likely pessimistic Cost ($) 60,000 80,000 120,000 Annual profit ($) 16,000 15,000 13,500 Useful life (years...

9 Estimates for a construction project appear in the following table: Dear optimistic most likely pessimistic Cost ($) 60,000 80,000 120,000 Annual profit ($) 16,000 15,000 13,500 Useful life (years) 10 10 10 Residual value ($) 0 0 0 a)Calculate the weighted average for costs and benefits, assigning 4 times more weight to the most probable estimate. b. Calculate the average internal rate of return. c)Weighted Average of Cost d)Weighted Average of Annual Profits e)Average internal rate of return