Given vectors ( veca = (3.0 , m, 20° , south of east) ), ( vecb = (2.0 , m, north) ), and ( vecc = (5.0 , m, 70° , south of west) ) in a coordinate system with the x-axis to the east, what is the x-component of ( veca + vecb + vecc )?
a) ( 3.0 + 2.0 + 5.0 ) m
b) ( 3.0 - 2.0 - 5.0 ) m
c) ( 3.0 + 2.0 - 5.0 ) m
d) ( 3.0 - 2.0 + 5.0 ) m