Two trucks are pulling a large storage container north, as shown in the figure below. The sum of the forces $\overrightarrow{F_1}$ and $\overrightarrow{F_2}$ that are exerted on the container by the horizontal steel cables in the north direction are also parallel to line "L". Note that $\overrightarrow{F_1}$ = 4400 N. Calculate $\overrightarrow{F_2}$ and the magnitude of $\overrightarrow{F_1}$ + $\overrightarrow{F_2}$ .