How do I solve this?

The following table shows a sample of room rates for a 100 room resort hotel in Nova Sootia for the time period Jan.1 to Dec. 2003. Note that 1/17/3 means January 1 to March 7 , 2003. Be sure to scroll down to see the bottom of the rate table. 1 double bedl Oceanfront 135, 1 double bed- 3 double bed: Oceanfront Suite 3 double bcdl Em Pen-In IMPORTANT: Please omit the dollar signs in all answers. Note: Suites have 3 beds. a. For the 9 time periods, what was the mean extra person rate? b. (i) This hotel has 20 typeA rooms, 15 type B, 30 type C, 25 type D and the remainder are type E. If the hotel was fully booked (with no extra people in any room) on Friday, Sept. 12th, 2003 then what was the mean revenue per room rounded to the nearest dollar? HINT: Use whole numbers. E (ii) What was the standard deviation of the room rates on Sept. 12 for this sample of the guest population? (Use 2 decimal places rounded ) c. (i) On Sunday, April 20, 2003 during the Eastern Conference Quarternals of the Stanley Cup Playoff (Ottawa beat the Islanders 3-0) the only rooms ocupied were 20 Type A, 15 Type B, and 7 Type E. What was the average revenue "per bed" on April 20? (Round to the nearest dollar. ) D (ii)What was the standard deviation of the the price per bed on April 20? (Note: use 2 decimal place rounded here.) D