This set of ranked data contains the red blood cell count for 20 randomly-selected dogs.

This set of ranked data contains the red blood cell count for 20 randomly-selected dogs. 

.2/5.2/5.3/5.6/6.0/6.1/6.1/6.1/6.2/6.3/6.6/6.8/6.8/6.8/6.9/7.0/7.1/7.5/8.1/8.2

A. What is the 40th percentile? 

         6.1

         6.15

         6.2

         6.3

B. What is the five-number summary?

       {.2, 6.05, 6.45, 6.95, 8.2}

       {.2, 6.1, 6.2, 7.0, 8.2}

       {.2, 6.0, 6.2, 7.05, 8.2}

C. What is the inter-quartile range?

        .9

        8

        1.05

        .50