A proton collides with a neutron (mass almost identical to the proton) to form a deuteron. What will be the velocity of the deuteron if it is formed from a proton moving with velocity 7.0 \times 10^6 m/sto the left and a neutron moving with velocity 4.0 \times 10^6 m/sto the right?( Proton mass =1.67 \times 10^{-27} )