If you have done the regression, you should have values for Bo, B1, B2, B3, B4 and e although I don't know why you have Bo and e instead of just the sum of the two.
For part a, insert the values given into your equation. DEMGOV=0 and SOUTH=1.
For part b, you will need to use the summary statistics generated by Excel. This link
shows you how to interpret the results table.