Hi, can someone please explain to me how they got the answer to this

Question: Find E(X|Y) and E[X - E(X|Y)]^2. Let

$\displaystyle \left(\begin{array}{cc}X\\Y\end{array}\right) $ ~ $\displaystyle N( \left (\begin{array}{cc}1\\-1\end{array}\right) $, $\displaystyle \left (\begin{array}{cc}5 & 2 \\ 2& 1 \end{array}\right) )$

I don't understand how they got the answer..

E(X|Y) = 1 + 2(Y + 1) = 2Y + 3

E[X - E(X|Y)]^2 = 5 - 4 = 1

Where did they get "1 + 2(Y + 1) " from?? and "5 - 4 " from??

can you guys please help explain this to me?