17.45 (*) For a portfolio of risks, all members' aggregate losses per year per exposure have...

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17.45 (*) For a portfolio of risks, all members' aggregate losses per year per exposure have a normal distribution with a standard deviation of 1,000. For these risks, 60% have a mean of 2,000, 30% have a mean of 3,000, and 10% have a mean of 4,000. A randomly selected risk had the following experience over three years. In year 1, there were 24 exposures with total losses of 24,000. In year 2, there were 30 exposures with total losses of 36,000. In year 3, there were 26 exposures with total losses of 28,000. Determine the Bhlmann-Straub estimate of the mean aggregate loss per year per exposure for year 4. 17.45 (*) For a portfolio of risks, all members' aggregate losses per year per exposure have a normal distribution with a standard deviation of 1,000. For these risks, 60% have a mean of 2,000, 30% have a mean of 3,000, and 10% have a mean of 4,000. A randomly selected risk had the following experience over three years. In year 1, there were 24 exposures with total losses of 24,000. In year 2, there were 30 exposures with total losses of 36,000. In year 3, there were 26 exposures with total losses of 28,000. Determine the Bhlmann-Straub estimate of the mean aggregate loss per year per exposure for year 4.