17.7-2. Consider the M/G/1 model with = 0.2 and = 0.25. T(a) Use the Excel template for this model (or hand calculations) to find the main measures of performanceL, Lq, W, Wqfor each of the following values of : 4, 3, 2, 1, 0. (b) What is the ratio of Lq with = 4 to Lq with = 0? What does this say about the importance of reducing the variability of the service times? (c) Calculate the reduction in Lq when is reduced from 4 to 3, from 3 to 2, from 2 to 1, and from 1 to 0. Which is the largest reduction? Which is the smallest? (d) Use trial and error with the template to see approximately how much would need to be increased with = 4 to achieve the same Lq as with = 0.25 and = 0. Please solve by hand