The pmf of the amount of memory X (GB) in a purchased flash drive is given as the following. 1 2 8 16 p(x) 0.05 0.15 0.25 0.30 0.25 4 (a) Compute E(X) (in GB). (Enter your answer to two decimal places.) GB (b) Compute V(X) (in GB2) directly from the definition. (Enter your answer to four decimal places.) GB² (c) Compute the standard deviation of X (in GB). (Round your answer to three decimal places.) GB (d) Compute V(X) (in GB2) using the shortcut formula. (Enter your answer to four decimal places.) GB²

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