Given $h(x,y,z)=e^{x^2+2y^2}$

Evaluate $\frac{\text{d}\text{e}\text{l}\text{h}}{\text{d}\text{e}\text{l}\text{z}}(x,y,z)$ at $(x,y,z)=(0,1,2)$

In other words, evaluate $\frac{\text{d}\text{e}\text{l}\text{h}}{\text{d}\text{e}\text{l}\text{z}}(0,1,2)$