What’s the product and the units

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

The figures below are made out of circles, semicircles, quarter circles, and a square. find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations).

If a || b and e || f , what if the value of y ?