A chain of sport shops catering to beginning skiers, headquartered in Aspen, Colorado, plans to conduct a study of how much a beginning skier spends on his or her initial purchase of equipment and supplies. Based on these figures, it wants to explore the possibility of offering combinations, such as a pair of boots and a pair of skis, to induce customers to buy more. A sample of 44 cash register receipts revealed these initial purchases: Click here for the Excel Data File a-1. Find the smallest class interval. Use five ciasses. (Round your answer to 1 decimal place.) a-2. What would be a better class interval? a-2. What would be a better class interval? b. Organize the data into a frequency distribution using a lower limit of $70