NEED DETAILED EXPLANATIONS, THX!!!

Problem 5 Clique Trees in Markov Networks Consider the distribution p(x1,x2,x3,x4)=(x1,x2)(x2,x3)(x3,x4)(x1,x4) a) Draw a junction (clique) tree that represents this distribution and indicate the separators on the graph. b) Write down an alternative formula for the distribution p(x1,x2,x3,x4) in terms of the marginal probabilities: p(x1,x2,x4),p(x2,x3,x4),p(x2,x4)