Given vector u, what is the magnitude, |u|, and directional angle, θ, in standard position?

a) |u| = 5.3, θ = 126.9°
b) |u| = 5.3, θ =143.1°
c) |u| = 10, θ = 126.9°
d) |u| = 10, θ = 143.1°

edge trig.
its c, but you can answer for points if you want :)