How many groups of 3/4 are in each of the following quantities?

How do i do this? i don’t understand

The following frequency table relates the weekly sales of bicycles at a given store over a 42-week period. value01234567frequency367108521(a) in how many weeks were at least 2 bikes sold? (b) in how many weeks were at least 5 bikes sold? (c) in how many weeks were an even number of bikes sold?

You can find the constant of proportionality by finding the ratio of