Find all the second order partial derivatives of the given function.
f(x,y)=x²+y-eˣ⁺ʸ
a. ∂²f/x² = 1-eˣ⁺ʸ; ∂²f/y² = -eˣ⁺ʸ; ∂²f/∂y∂x =∂²f/∂x∂y = -eˣ⁺ʸ
b. ∂²f/x² = 2-eˣ⁺ʸ; ∂²f/y² = -eˣ⁺ʸ; ∂²f/∂y∂x =∂²f/∂x∂y = -eˣ⁺ʸ
c. ∂²f/x² = 2-y²eˣ⁺ʸ; ∂²f/y² = -x²eˣ⁺ʸ; ∂²f/∂y∂x =∂²f/∂x∂y = -y²eˣ⁺ʸ
d. ∂²f/x² = 2+eˣ⁺ʸ; ∂²f/y² = -eˣ⁺ʸ; ∂²f/∂y∂x =∂²f/∂x∂y = eˣ⁺ʸ