2. Before negotiating a longterm construction contract, building contractors must care fully estimate the total cost of completing the project. For a particular construction project it is assumed that the total cost, X, is normally distributed with mean $850,000 and stan dard deviation $170,000. The revenue, R, promised to the contractor is $1,000,000. (21) The contract will be protable if revenue exceeds total cost. What is the probability that the contract will be profitable for the contractor? (10 pts.) (b) Suppose that the contractor has the opportunity to renegotiate the contract. Wlhat value of R should the contractor strive for in order to have a .99 probability of making a profit?| (10 pts) Use the normal probability table in the course supplement or in the textbook