1. Often, cruise ships conduct all onboard transactions, with the exception of gambling, on a cashless basis. At the end of the cruise, guests pay one bill that covers all onboard transactions. Suppose that 60 single travelers and 70 couples were surveyed as to their on-board bills for a seven-day cruise from Los Angeles to the Mexican Riviera. Following is a summary of the bills for each group.

Singles	Couples
Amount($)	Frequency	Relative Frequency	Amount($)	Frequency	Relative Frequency
51-100	5		100-150	5
101-150	10		201-250	5
151-200	15		251-300	5
201-250	15		301-350	5
251-300	10		351-400	10
301-350	5		401-450	10
			451-500	10
			501-550	10
			551-600	5

a.

Fill in the relative frequency for each group.

b. Construct a histogram for the singles group. Scale the x-axis by $50 widths. Use relative frequency on the y-axis.

c. Construct a histogram for the couples group. Scale the x-axis by $50 widths. Use relative frequency on the y-axis.