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Suppose that w=x + y + 16z+t and x +4z +t= - 8. Assuming that the independent variables are x, y, and aw z, find ax OA. TW = 2x - 1 O B. dw dx - = 2x +4 O C. w ax = 2x + 1 OD. dw - =2x -4Find the requested partial derivative. dz aw + 18xyz and + =0. if w = x" +y 3 + Z 3 3x dx O A. 3x2 O B. 3(x2 + y2 + 2 2 ) O C. 18(x2 + yz + z?) O D. 18x2Find the requested partial derivative. dz if z" =z + xy - 1 and y" 3 =xty-1 dy O A. x + 3y" -y 324 - 1 OB. x- 3y - y 322 + 1 O C. x - 3y" - y 3 322 - 1 O D. x+ 3y" -y 32- + 1