2021 May TZ1 P1 Q4

A research student weighed lizard eggs in grams and recorded the results. The following box and whisker diagram shows a summary of the results where \(L\) and \(U\) are the lower and upper quartiles respectively.

The interquartile range is \(20\) grams and there are no outliers in the results.

1. Find the minimum possible value of \(U\).

   [3]

2. Hence, find the minimum possible value of \(L\).

   [2]