In Table 1, use the redshift of the spectral lines to determine the speed of each galaxy. To do this, use a ruler to align the leftmost spectral line provided with each galaxy with the speed scale at the bottom of the table.

The bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms