Do 1-5 showing all working, the topic is implicit differentiation

11. Implicit Differentiation - Homework 1 . Find foray + .x = 7 at (-1, -8 ) 2. Find " for x' - y' =0 at (-8,4) dx dx dx 3. Find for Vr + Vy =9 at (16, 25) 4. Find " for - x" - xy + yz = 2x-y at (2, -3) dx dx 5. Find ~ for xy - x y = 6 at (2,-1) Find dy In for ( x - y) =x+y'+8 at (1,-1) d.x *. Find for Vry = x - 2y at ( 4, 1) 8. Find ~ f dy for xcosy - 2sin ( )=0 at (2." )