Problem $2(25$ points$)$

I caught Dr$.$ Husseini doing some skateboarding tricks down the Oval Deck

handrails. The combined force from Dr$.$ Husseini's skateboard, head, and cartoon

body is $F=\{75i+350j-525k\}lb$ acting at point A$.$ The location of the rail $($from

C to D $)$ in space can be described by $r_{CD}=\{2\mathrm{.}5i-3\mathrm{.}0j-3\mathrm{.}5k\}ft.$

A$)$ Determine the magnitude of Dr$.$ Husseini's force acting along the rail

$($line CD$)(15$pts$)$

B$)$ Determine the amount of Dr$.$ Husseini's force acting perpendicular to the rail $($line CD$)(10$pts$)$