What is the volume of a sphere with a radius of 5 centimeters?

Plz which expression is equivalent to the expression below?

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?

Can some one me with these questions