“An aircraft control actuator is part of the flight control system that enables an airplane to fly. It is important that the actuators are reliable. Reliability can be defined as the probability a system is functioning, so it is a number between 0 and 1. The development and installation cost as a function of reliability equals [$1630+ $14633*(In R)], which will be paid immediately. Maintenance on the actuator will occur in year 4 and in year 7. In each year the maintenance cost as a function of reliability R is [$1420/ln(1.45R)]. Assume the interest rate is 8%.