Let * be the binary operation on N given by a * b = L.C.M. of a and b Find:

(i) 5 * 7, 10 * 16

(ii) Is * commutative?

(iii) Is * associative?

(iv) Find the identity of * in N.

(v) Which elements of N are invertible for the operation *?

(i) 5 * 7, 10 * 16

(ii) Is * commutative?

(iii) Is * associative?

(iv) Find the identity of * in N.

(v) Which elements of N are invertible for the operation *?