Please solve these problems please thank you!

Problem 1. Find the equation of the tangent Plane and the parametric equation of the normal for z = q- x2- 72 at the Point ( 1 12, 4) Problem2 . Find the total derivative of the following functions. D foxcry) = ( ex sing , ex cosy , Jey ) 2 f( x4 4, 2 ) = ( 10 YZ , sina cosy) Problem 3 . Find the Jacobian mattix of the following function at a given paint P. D flay) = (xy, xcty, x- y ) , P = (1 12) 2 f ( x , y ) = ( singc , cosy ) , p = (I, 1 )