how do I find 3pma, 3pf, error, abs error, MAPE. What formula do I use to find these? You don't have to give the answer I'm looking for the formulas I plug in.

Q1. Simple Moving Average Demand 3PMA 3PF Error Abs Error MAPE Oct 10,193 Nov 11,599 Dec 11, 130 Jan 10,696 Feb 9,665 Mar 10,179 Apr 11,760 May 9,150 Jun 9,571 Jul 8,375 Aug 11,826 Sep 10,696 Oct 11,212 Nov 9,750 Dec 9,380 Total Demand Avg. Demand Total Bias Ave. Bias Abs Dev MAD MAPE