How is the de-Broglie wavelength of a non-relativistic particle associated with its KE (K)?

What is the de Broglie wavelength

Show that the velocity of de Broglie wave is more than the velocity of particle associated with it.

What is the de-Broglie wavelength of a dust particle of mass 1.0 xx 10^-9 kg drifting with a speed of 2.2 m/s?

The kinetic energy of an electrons is equal to the energy of photons. Show that de-Broglie wavelength of this electrons is less than the wavelength associated with a photon.

A particle is moving with a speed three times as that of an electron.If the ratio of de-Broglie wavelength of the wave associated with the particle to that with the electron is 1.813 xx 10^(-4) ,find the mass of hte particle.Can you identiify hte particle?Give that mass of the electron = 9.1 xx 01^(-31) kg.