Help me please

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?

For what value of (y) is 3^3/3^y =1/9

What are the domain and range of the function f(x)=2^x+1