Question 13 1 pts Find all the first order partial derivatives for the following function. 1 f( x, y) = x2 + v O X V = 2(x 2 + 2, 3/2 = 2( x 2 + 2, 3/2 O V = 9 2 ( 2 + 1 2 ) 3/2 O of 1 = = .9 2( x2 + 12) 3/2 O a X ox 2(x2 + +2,3/2 v .Question 15 1 pts Find all the second order partial derivatives of the given function. f ( x, y ) = x- ty- exty O = 2 - yzexty; = -x2exty. = = y-exty O of = 2+ exty. exty. = exty O = 2 - exty. = - exty . = - exty O = 1 - exty. = - exty . = -extyQuestion 14 1 pts Find all the first order partial derivatives for the following function. f ( x, y ) = xye-y O a a = yey ; ov = xe (y - 1) O a a = yety; 9 2 = - xyey O = yey; av = xe (1 - y) O d a = yey. ov = xe y