Calculus help please just these three 15.2 and 15.3 problem need within an hour thank you

Locate and classify all the critical points of the function. (HINT See Example 2. If an answer does not exist, enter DNE.) f( x, y ) = x2 + 4yz+ 3 (x, V ) = Select- Need Help? Read It Talk to a Tutor Submit Answer 3. [-/5 Points] DETAILS WANEFMAC7 15.3.014. Locate and classify all the critical points of the function. (HINT See Example 2. If an answer does not exist, enter DNE.) g(x, y) = 2x2 + x+ 12 - y-1 (x, y) = ---Select-- Need Help? Read It Talk to a Tutor 4. [-/5 Points] DETAILS WANEFMAC7 15.3.020. Locate and classify all the critical points of the function. (HINT See Example 2. If an answer does not exist, enter DNE.) g(x, y) = -x2 - 2xy + 12 + x- 2y (x, V ) = ---Select- Need Help? Read It Talk to a Tutor