Hello guys !!

i have this problems while solving problems on vector calculus ..

i solved (a) , (b)

as i put P(2,4,3) in the formula of S and i solved it and i solved (b) as a(S)= S/lSl

but in (c) i don’t how what should i do to solve it ..please help me guys ..Thank you

http://ift.tt/1nnbqYu