Calculate $\frac{de{l}^{2}f}{del{x}^2},\frac{de{l}^{2}f}{del{y}^2},\frac{de{l}^{2}f}{\text{d}\text{e}\text{l}\text{x}\text{d}\text{e}\text{l}\text{y}},$ and $\frac{de{l}^{2}f}{\text{d}\text{e}\text{l}\text{y}\text{d}\text{e}\text{l}\text{x}}$

$q,f(x,y)=e^{9x+8y}$

$\frac{de{l}^{2}f}{del{x}^2}=$

$\frac{de{l}^{2}f}{del{y}^2}=$

$\frac{de{l}^{2}f}{\text{d}\text{e}\text{l}\text{x}\text{d}\text{e}\text{l}\text{y}}=$

$\frac{de{l}^{2}f}{\text{d}\text{e}\text{l}\text{y}\text{d}\text{e}\text{l}\text{x}}=$

Evaluate them all at $(1,-1)$ if possible. $($If an answer is undefined, enter UNDEFINED.$)$

$\frac{de{l}^{2}f}{del{x}^2}(1,-1)=$

$\frac{de{l}^{2}f}{del{y}^2}(1,-1)=$

$\frac{de{l}^{2}f}{\text{d}\text{e}\text{l}\text{x}\text{d}\text{e}\text{l}\text{y}}(1,-1)=$

$\frac{de{l}^{2}f}{\text{d}\text{e}\text{l}\text{y}\text{d}\text{e}\text{l}\text{x}}(1,-1)=$