Hi I need help on what is the answer to this problems? Below is the question and other concerns will be in the comment section. I hope you can help me and surely I will give you full positive feedback.

II. Modified True or False. On the space provide before each number, write TRUE if the statement is true; otherwise, change the italicized word phrase or expression to make the statement correct. 1. If z = 3xly - 2xy', then dz = (6xy - 2y? )dx + (3x2 -4xy)dy ANSWER: MATH 2. Consider the functionf (x, y) = 3x2 - 2xy3. The partial derivative with respect to y is equal to -6xy2 ANSWER" MATH 3. Consider the functionf(x, y) = 3x2 - 2xy3. The partial derivative with respect to x is equal to 6x - 2y's . ANSWER: MATH 4. If xy + xz + yz = 0, then dz x+z ANSWER: Y+Z ax zty X+y 5. If xy + xz + yz = 0, then az xtz ay ANSWER:MATH 6. Suppose the demand equations for two related commodities are given by x = f(p, q) andy = g(p. q). where x and y are the quantities and p and q are the corresponding unit prices. The commodities are competitive if = > 0 and