I have the right solutions for thoses questions but i need to know how to calculate it! The bold answer is the correct one.

A bank offers loans, which are granted within 24 hours. The employees in the credit department work 8 hours a day. The process of granting a loan takes 30 minutes. Currently, the bank has 80 applications waiting to be processed. With the current number of employees, these 80 applications can be reviewed within one working day.

a) Calculate the cycle time of the current process. A. 0.1 hours B. 0.2 hours C. 0.5 hours D. 8 hours E. 24 hours

b) The bank carries out a marketing campaign. Due to the campaign, loan applications increase to 144 a day. How many additional employees are needed to continue to respond to the applications within 24 hours while maintaining the same level of effectiveness? A. 2 employees B. 4 employees C. 8 employees D. 16 employees E. 32 employees

c) The bank now decides not to hire any additional employees. Nevertheless, after a short period of time, the bank manages to respond to the increased number of new applications of 144 applications within 24 hours. What is likely to be the main reason or trigger for this success? A. The cycle time can be increased by 80%. B. The output rate can be reduced by 80%. C. The quality of loan processing can be increased by 80%. D. Employee effectiveness can be increased by 80%. E. Throughput time can be increased by 80%.