I will give you brainliest if you give me the correct answer

30 m/s

Explanation:

if you look at the graph and you start at the notch in between 20 and 10, and go over 1 (making sure to go over a full second so you land on an inbetween gray line) you go up 30. so its 30 m/s.

i hope this helps :))

b) the inside picture would look at a very high temperature in a very low ph