T3 It is Bill's birthday and he is one year older than Ben. a) Ben gives him a card saying "we have nothing in common". Show that their ages are coprime i.e. n and n + 1 are coprime for all n 2 1. b) Bob being more practical offers to fix some shelves for Bill. Find the equation of the plane that is parallel to the plane 5:; 3y + 2 =06 and goes through the point P(4, 1, 2)