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The following question is optional and may be attempted for bonus marks. 5. MVUE n Refer to Question 1, where X1, X2, ..., Xn ~ iid Po()) and S(ac) =) i=1 (a) Find the MVUE for ek where k > 0 is a constant. Hint: Look at the MGF of S(x). [5 mark (b) Use the results in part (a) to prove that [5 mark S E [2*n | S(a) = s] = 1+ * * * * * * *