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In the sum vecA + vecb + cecC. vector ve...

In the sum `vecA + vecb + cecC.` vector `vecA` has a magnitude of `12.0` m and is angled `40.0^(@)` counterclockwise from the +x direction, and vector `vecC` has a magnitude of `16.0` m and is angled `20.0^(@)` counterclockwise from the -x direction. What are (a) the magnitude and (b) the angle (relative to +x) of `vecB` ?

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`(a) 276 m, (b) 209 ^(@) (or - 151^(@))`
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