For some made-up students, the correlation between the hours of sleep x and the number of mistakes…

For some made-up students, the correlation between the hours of sleep $x$ and the number of mistakes $y$ in a puzzle is $r = -0.68$. A researcher makes two new variables: $u = 60x$, the sleep in minutes, and $v = 20 - y$, the number of puzzle items done right out of $20$. Find the correlation between $u$ and $y$, and the correlation between $u$ and $v$.