Can you help me with part C for finding efficiency?

A firm uses a serial assembly system and needs answers to the following: a. An output of 900 units per shift (10.50 hours) is desired for a new processing system. The system requires product to pass through four stations where the work content at each station is 30 seconds. What is the required cycle time for such a system? (Round your answer to the nearest whole number.) O Answer is complete and correct. 42 O seconds Cycle time b. How efficient is your system with the cycle time you calculated? (Round your answer to 1 decimal place.) O Answer is complete and correct. 71.4 O % Efficiency c. Station 3 changes and now requires 50 seconds to complete. What will need to be done to meet demand (assume only 10.50 hours are available)? What is the efficiency of the new system? (Round your answer to 1 decimal place.) Answer is complete but not entirely correct. To satisfy the demand, station 3 will and the efficiency 70.0 X %. need to be duplicated