Chemical bonding: compare question

Table 1 gives data for the carbon-carbon bonds in ethane, $\ce{C2H6}$, and ethene, $\ce{C2H4}$.

Compare the nature of the covalent bonding in the carbon-carbon bonds of ethane and ethene. In your answer, discuss the types of bonds ($\sigma$ and $\pi$), the bond lengths and bond energies, the hybridisation of the carbon atoms, and the relative reactivities of the two molecules.