Solving the Fermi Energy of Copper: Momentum, Wavelength, Velocity

[sanjeeb]

please help me solve this...
fermi energy of copper is 7eV.
what is the fermi momentum of an electron in copper?
what is the de Broglie wavelength of the electron?
what is the fermi velocity?///
please help/////

 

[hage567]

Show your work so far.