1. Calculate the following matrix-vector products. \text { (a) }\left[\begin{array}{cc} 1 & 4 \\ -2 & 3 \end{array}\right]\left[\begin{array}{l} 5 \\ 2 \end{array}\right] \text { (b) }\left[\begin{array}{cccc} 1 & 4 &

0 & -3 \\ 0 & 1 & 2 & 4 \end{array}\right]\left[\begin{array}{c} 3 \\ -1 \\ 4 \\ -1 \end{array}\right] \text { (c) }\left[\begin{array}{cc} 3 & 1 \\ -2 & 4 \\ 5 & -3 \end{array}\right]\left[\begin{array}{c} 4 \\ -2 \end{array}\right]