K is $5$ Question $1$: Three concurrent forces acting on a point and they are given as F$1=[(8+0\mathrm{.}5$K$1)$i $+6$j$]$ N$,$ F$2=[-15$i $+(8+0\mathrm{.}3$K$1)$j$]$ N and F$3=(-10$i $-10$j$)$ N$.$ Determine the magnitude of the resultant and its direction by using the parallelogram only.