Use vec$(u)=($:$4,-3,-4$:$)$ and vec$(v)=($:$3,-2,5$:$),$ and vec$(w)=($:$-3,5,0$:$)$ for problems $1-6.$Find $l|vec(u)$vec$(v)|.$

Calculator $(vec(u)$vec$(v))*vec(w)$Find the unit vector for vec$(w)$ and prove it is a unit vector