This is in Differential Calculus. This is only multiple choice. Provide necessary solution for each items. Thank you and Godbless.

7. Given x y' =e", find X-V A) C) x(2 - my) x(2- Iny) B) D) x(2- my) v(2- ly) 8. Use partial derivative to compute y' in the equation x'y+xy' -xly + ysinx -4=0. 3x y+y' - my+ycos.x 3x y+y' - my+ycos.x A) C) x3 + 3xy? _ -+ sinx x' + 3xy - Iny + sin.x x' + 3xy- - + sinx x'y+y' - xhy+y cos.x V B) D) + sinx 3x yty' - my+ ycosx V 9. The temperature 7 in degrees centigrade at each point (x, y) in the region x + y's 1 is given by T= 16x2 +24x+ 40y. Find the temperature at the coldest point in the region. A) -10 C C) -9C B) -12'C D) -50C