Pls Help me.
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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 someone me out here and the tell me the greatest common factor

Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?