Problem 7- Consider the following graph. D a-Which pairs of variables are independent in the graphical model below, given that none of them have been observed? b-Assume that the value of E is known. (E is observed. A, B, C, and D are not observed.) Which pairs of variables (not including E) are independent in the same graphical model, given E? C-what is the decomposition of the joint distribution P(A,B,C,E)? d-How many independent parameters are required to uniquely define the CPD of E (the conditional probability distribution associated with the variable E) if A, B, and D are binary, and C and E have three values each