Maximum Destruction Pictures A Farmer Purchases A 5 Year Insurance Policy That Covers Crop Destruction Due To Hail. Over The 5 Year Period

A farmer purchases a 5 year insurance policy that covers crop destruction due to hail. Over the 5 year period - maximum destruction pictures

A farmer buying 5 insurance for one year to the destruction of crops by hail. During the period of 5 years, the farmer of a power of 20 per year in which hail destroys his crop to receive up to a maximum of 3 power payments. The probability that hail has destroyed the harvest of the farmer for each year, 0.5, independently of each year.
Calculate the expected profit that the farmer will receive a period of 5 years.