Please help with explanation.

Iwill make brain if you me correctly fill this out needs due today pls and send it back to me (click the link and you will get it)

Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.

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?