Corner, owner of Corner Bike Rentals, wants to start analyzing his companys quality. For each bike rental, there are four types of customer complaints: bike not working properly, bike wrong size, bike uncomfortable, and bike broken during operation. During the past week, his company rented 280 bikes. He received 26 total complaints.

a. What is his companys DPMO for the past week?

b. What is their Six Sigma operating level?

c. If Jim wanted to operate at the 5-sigma Jim level, what would his errors have needed to be over the past week?