Problem. 5 : Sketch the level curves associated with the function corresponding to each value of Z. f(x, y) = 49 - 23 z = 0, 1, 2, 3, 4Problem. 5 :Let f(:c,y] = 41:2 + 73:2. Find the following. fz(453}= I EELS}: I Problem. 7 : Find the first partial derivatives of the function f(:c,y}=:_'5 a I31! E: I 3y Problem. 3 : Find the first partial derivatives of the function f{m,y}=3+;d+l 23' ||