dz 3': Use the functions below to {a} express a and E as functions of u and v both by using the Chain Rule and by expressing 2 directly in terms ofu and v before differentiating. Then Biz dz _ _ [b] evaluate a and E at the given point (u.v]. -1 X TE z=5tan ; :x=ucosv:y=usinv:(u:v)= 0.6.E dz o'z _ Express 3 and a as functions ofx and 1;. dz I = |_| [Type an exact answer.) = (Type an exact answer.) Express z directly in terms of u and v. Z = (Type an exact answer.)dz dz Express du and as functions of u and v. dz = du (Type an exact answer.)dz (Type an exact answer.) dz dz (b) Evaluate and at 10.6. dudz E du (Type an integer or a decimal rounded to the nearest thousandth as needed.) dz = 21 (Type an integer or a decimal rounded to the nearest thousandth as needed.)