In the sum A $+$ B $=$ C$,$ vector A has a magnitude of $12\mathrm{.}0$ m and is angled $40\mathrm{.}0\backslash$deg counterclockwise from the $+$x direction, and vec$-$ tor has a magnitude of $16\mathrm{.}0$ m and is angled $20\mathrm{.}0\backslash$deg counterclock$-$ wise from the $-$x direction. What are $($a$)$ the magnitude and $($b$)$ the angle $($relative to $+$x$)$ of B$?$