1. Aran has been told he’s allowed to choose three fish from an aquarium he is visiting to add to his fish collection.  There are four tetras, six guppies and two platies available for him to choose from.  In how many ways can Aran choose his fish if he decides to have:

(i) one of each type of fish?

(ii) one tetra fish and two guppies?

(iii) two tetras and one other fish?