$(40$ points$)$ Question $25,$ Quantitative Methods for Business, Ch $15$

a$.($PS $1-5$ points$)$ Conceptual understanding

b$.($PS $2-15$ points$)$ Calculate the following performance measurements for the system described in Question $25$

i$.$ Average number of customers waiting

ii$.$ Average number of custorners in the system

iii. Average waiting time.

iv$.$ Average time in the system

c$.($PS$4-5$ points$)$ Compare the results with the two$-$server waiting line system with the shared queue in Section $15\mathrm{.}3$

d$.($PS$4-15$ points$)$ What is your recommendation? Explain based on the results of the two$-$server waiting line system and the share queue in section $15\mathrm{.}3.$