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Savt Answer QUESTION 4 (25%): Khaled Assaf runs a small Scooter rental business in Dubai. On average, tourists who want to see the city on a Scooter come every 30 minutes (with a coefficient of variation of 1, no seasonality exists). Khaled Assaf has six Scooters and will give one to a tourist if it is available. If he runs out of Scooters, he will lose those tourists. On average, a tourist will return the Scooter to Khaled Assaf in 2 hours (with a standard deviation of 2 hours). Khaled Assaf's Scooter rental shop operates from 8:00 am to 6:00 pm a day. 4.a What percentage of the tourists who come to rent a Scooter end up not being able to rent one? 4.b If the rental fee is 40 dollars per person. How much can khaled Assaf make from the rental business on an average business day? You can ignore any beginning-of-day and end-of-day effects, i.e., assume that the system is in steady state. 4.c Khaled Assaf improved his tour guide information and installed GPS on his Scooters. This led to a reduction in the standard deviation of the length of the rental from 2 to 1.5 hours. The mean rental time remains the same at 2 hours. How will this service improvement affect the number of tourists who have immediate access to a Scooter? 4.d Khaled Assaf wants to accommodate at least 90% of all tourists needing a Scooter. What is the minimum number of Scooters necessary to meet this requirement? (Assume that the time spent on the Scooter cannot be changed.)