Please provide a clear step by step solution for this question. Thanks a lot!!

Question 2. The number of last-minute hotel reservation cancellations for the month of June is mean, / =5, and the Standard deviation, = 4. In the hotel the average room rate $85. That is, if a room remains vacant, the opportunity (lost) cost Cy = $85). If the hotel is overbooked, the policy is to find a room for the guest (in a nearby hotel), and pay for the guest room (customer). Usually, this overbooked cost (Co) is $150. How many rooms should the hotel overlook? Approx. next rounding number (for example, 8.46 will be 9) Optimal Stock Level, X=1 + Z(o) Suggestion Step 1: Find the P-value (probability): P = Cu/(Cu + Co) = (value) Step 2: Find Z-value using Excel NORMSINV (P-value) From normal table, P = value correspond to Z value = (value) Step 3: Find X-value (u and o known) from the equation: Substituting Z = (value) to find the X = ? Z= (X-w/o or, x= Z*o+/ 0 3 4 0 6 0 5