For each of the following studies, suggest an appropriate statistical summary (that is, a statistic and a graph) to fully describe the data. No explanation is needed.

a)For each of her 60 clients last month that needed corrective glasses, the owner of an optometry store recorded the eye condition (far sighted, near sighted, needs bifocals) for further investigation.

b)A mortgage broker believes that the amount of money people borrow to purchase a home is related to the interest rate that is offered. For a sample of 50 months drawn from over the past 30 years, the total amount of mortgage loans offered by Canadian financial institutions and the mortgage interest rate offered each month are taken to investigate.

c)A Canadian start-up company is building a database of its customers. For the 64 new customers it acquired last month, it recorded the amount of service (in $) the customer had purchased with the company.