please solve for b, c, and d. show work and specify which answers go to which problems. thank y oh so much and have a great day! :)

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?

Jonathan puts $400 in a bank account. each year the account earns 6% simple interest. how much interest will be earned in 5 years?

Find the volume of the wedge cut from the first octant by the cylinder z=12-3y^2 and the plane x+y=2.