1)A postal office has a package processing center at its head office. The main systems in package processing center are unloading. Sorting and delivery. The center has 30 employees who unload packages from big tracks that are used to transport packages from airports to the company's head office. Another 20 employees then sort the packages to make the packages ready for deliveries to different local postal offices, and 40 more employees then load the vans that are used for local deliveries. Un-loaders work at the rate of 12 packages per minute, sorters work at a rate of 15 packages per minute, and loaders take approximately 10 seconds to load each package.

Required:

a)Assuming that the subsystems are operating in series, what is the system capacity of the package processing center?

b)Complete the systems efficiency of the package processing center, assuming that the actual number of packages processed per minute during a particular observation was 200.