Hello. please include all ur work to answer the following homework questions.

I don't understand most of the questions. Please include step-by-step work.

This is Univerisity Calculus 3.

Find the directional derivative of the function } at point } in the direction of (). Q1 : f ( n , y ) = 2 - y ortien a) : /2 Opwen b ) : 14 P = (-L-D Option () : 2 U = ( ! , I) Q)2. A particle in a circula with the equation of motion r( t) = - Scosti + Saint;. Find the distance travelled crowd the circle by the particle . a ) Find T( ) for the curve r (t ) = ( t ' - 40 )i + ( 4 + 2 3 ) j b ) Find the equation of the tangent plane to the surface 23+? - Zzyz at the point PC1 , 2 , 4 4 ) . Hint : Solve for Z in terms of 2-4