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b) A computer store purchased three computers of a certain type at $500 a piece. It will sell them for $1000 a piece. The manufacturer has agreed to repurchase any computers still unsold after a specied period at $200 a piece. Let X denote the number of computers sold, and suppose that p(0)=0.l, p(l)=0.2, p(2)=0.3, p(3)=0.4. i. Compute the value of E(X) [3 marks] ii. Determine the expected prot: h(X) = revenue cost [3 marks] iii. Compute the Variance of h(X) [4 marks]