Can someone solve this problem?
Five cards are dealt in sequence from a well-shuffled pack of 52 cards. Define the random variables Xi (i= 1, 2, 3, 4, 5) as follows:
Xi = 1 if the ith card is a heart
Xi = 0 if the ith card is not a heart
(i) Find Cov(X1, X2)
(ii) Determine Var(X1 + X2 + X3 + X4 + X5)
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