Please help.

The following table shows a sample of room rates for a 100 room resort hotel in Nova Scotia for the time period Jan.1 to Dec. 2003. Note that 1/1-7/3 means January 1 to March 7 , 2003. Be sur to scroll down to see the bottom of the rate table. 2003 1/1 8/3 Room Rates 31/3 1/6 S -7/3 2/9 9/10 - 30/3 31/5 2/12 -30/6 21/12 Oceanfront 8/10 -1/12 -20/12 31/12 double bed 125 100 150 125 Oceanfront 2 double beds 135 110 160 105 135 Oceanfront Effic 2 double beds 105 155 115 130 180 125 115 105 155 2 room suite 3 double beds 120 175 130 150 200 140 130 120 175 Oceanfront Suite 3 double beds 140 200 150 175 225 165 150 140 200 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 type A 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. 0 (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, September 20, 2003 during the Eastern Conference Quarterfinals 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 September 20? (Round to the nearest dollar. )