I am assigned this excel sheet, but I do not understand how to even begin to find these numbers

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Special Revenue Error Error SQ a Year Revenue ESForecast 1996 53,421,417 1997 64,600,858 1998 67,053,747 1999 24,316,124 2000 66,110,642 2001 93,389,137 2002 49,686,023 2003 20,706,410 Mean RMSE 5 yr MA Special Revenue Error Error SQ a Year Revenue ESForecast 1996 53,421,417 1997 64,600,858 1998 67,053,747 1999 24,316,124 2000 66,110,642 2001 93,389,137 2002 49,686,023 2003 20,706,410 Mean RMSE 5 yr MA