2. [Module E: 20 points]. Imagine you are the service operation manager of a company that installs tankless water heaters at residential homes. One of your tasks is to develop a labour time estimate for installation of tankless water heaters for 20 customers. It is estimated that the first installation will require 240 minutes of labour, and the learning curve of 90% is expected. a. b. c. d. How many labourhours is required for the 10'h installation? How many labourhours is required to complete the rst 10 units? (5) How many labour-hours is required for the 20m installation? How many labour-hours is required to complete all 20 installations? (5) How many labour hours is required to compete units 11 to 20'? (5) If the average labour cost is $50 per hour, what is the total labour cost for installing all 20 tankless water heaters