discrete mathematics

Let $196 be the set of all divisors of 196. Let the relation s be given by a b if al b on $196- (i) Prove that the relation \\ is a partial order relation. (ii)Draw the Hasse diagram for the poset ( S196 \\) (iii) Find the least element and greatest element of this POSET if it exists. (iv) Test whether the POSET is a lattice. (v)Find the g.1.b and lub of 14.7,14.28)