How to do it what problem is this

Plz, ! the box plot below shows the total amount of time, in minutes, the students of a class surf the internet every day: a box plot is shown.part a: list two pieces of information that are provided by the graph and one piece of information that is not provided by the graph. (4 points) part b: calculate the interquartile range of the data, and explain in a sentence or two what it represents. (4 points) part c: explain what affect, if any, there will be if an outlier is present. (2 points)

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'