The heights, in centimeters, of 100 plants of each of species A and species B are recorded.
The cumulative frequency curves show the distributions of their heights.

1. (i)

   Use the curve to estimate

   1. (a)

      the median height for species B.

      Answer ___ cm

   2. (b)

      the 40th percentile for species A,

      Answer ___ cm

   3. (c)

      the interquartile range for species A.

      Answer ___ cm

2. (ii)

   Plants from species B are used for an event.
   Only plants with height within 10% of 50 cm are used.
   Find the percentage of plants from species B which are used.

   Answer ___ %