mean and standard deviation of random variables

A shop's daily revenue $X$ and daily cost $Y$ are independent random variables with $E(X) = 5{,}000$ dollars, $E(Y) = 3{,}200$ dollars, $\text{Var}(X) = 640{,}000$ and $\text{Var}(Y) = 250{,}000$. Daily profit is $X - Y$. Which of the following gives the expected daily profit and its standard deviation?

A basketball player takes 2 free throws. The probability that she makes the first is 0.75. If she makes the first, the probability that she makes the second is 0.80; if she misses the first, the probability that she makes the second is 0.60. Let $X$ be the number of free throws she makes. Which of the following gives the mean and the variance of $X$?