Compare two columns in two different spreadsheets and Highlight difference

Hi

My request is

1) To compare one column A in sheet1 with column A in sheet 2 , once the value of both are equal, then compare Column B of sheet1 and column B of Sheet2, if they are same , do nothing but if they are different , Highlight it with a colour.

2) If the value in column A of sheet 1 is not present in the column A of sheet 2 , then show "New Entry"

Kindly help me with a macro or some formula which can give these results. Spreadsheet attached.

Thanks a lot for your help

Regards
Shilloh