Question$3.(8$ Marks$)$ : Calculate the six Partial Derivative $\frac{\text{d}\text{e}\text{l}\text{f}}{del{x}^{\text{'}}}\frac{\text{d}\text{e}\text{l}\text{f}}{del{y}^{\text{'}}}\frac{de{l}^{2}f}{del{x}^2},\frac{de{l}^{2}f}{del{y}^2}\frac{de{l}^{2}f}{\text{d}\text{e}\text{l}\text{x}\text{d}\text{e}\text{l}\text{y}},\frac{de{l}^{2}f}{\text{d}\text{e}\text{l}\text{y}\text{d}\text{e}\text{l}\text{x}}$ of the following functions:

$1f(x,y)=2x^2{y}^2-3x^2-2y^2+xcosy$

$2f(x,y)=e^{xy}+e^{x+y}$