Problem 4S-21 A manager must decide between two machines. The manager will take into account each machine's operating costs and initial costs, and its breakdown and repair times. Machine A has a projected average operating time of 145 hours and a projected average repair time of 7 hours. Projected times for machine B are an average operating time of 75 hours and a repair time of 4 hours. What are the projected availabilities of each machine? (Round your answers to 3 decimal places.) Availability Machine Machine