loss amounts under a class of insurance policies follow exponential distribution with mean 100. the insurance company wishes to enter into an individual excess of loss reinsurance arrangement with retention level m set such that 8 out of 10 claims will not involve the reinsurer. O find the retention m. 21 for a given claim, let x, denote the amount paid by the insurer and op the amount paid by the reinswer. g calculate ex1) and exe)