PLEASE GIVE FULL SOLUTION

The electric field intensity in a lossy medium is given by the following expression:

$\frac{?}{\text{b}\text{a}\text{r}}(E)=1000$hat$(a{)}_x{e}^{-2z}cos({10}^{4}t-2z)(\frac{V}{m})$

a$)$ Find the unit vector in the direction of the propagation.

b$)$ Find the attenuation and phase constants.

c$)$ Find the wavelength and the phase velocity.