Find the value of a, b, c, d if \(\begin{pmatrix} a+b & c \\ a-b & 2c+d \\ \end{pmatrix}\) = \(\begin{pmatrix} 3 & 2 \\ 1 & 6 \\ \end{pmatrix}\)
\(3, 2, 1, 4\)
\(2, 1, 2, 2\)
\(3, 2, 1, 6\)
\(2, 2, 2, 2\)
