moving average also to the future

hi rajendraongole1  Thanks for your reaction. This solution gives not exactly what i hoped for:

For period 5 i want the moving average of period 2 + 3 + 4

For period 6 i want the average of period 3 + 4 + moving average period 5

For period 7 i want the average of period 4 + moving average period 5 + moving average period 6

For period 8 i want the average of moving average period 5 + moving average period 6 + moving average period 7 

* for periode 01-05-2024 the average of the last 3 months (6+5+8)/3 = 6.33 
* for periode 01-06-2024 the average of (5+8+6.33)/3 = 6.44
* for periode 01-07-2024 the average of (8 +6.33 + 6.44)/3 = 6.93
* for periode 01-08-2024 the average of (6.33+6.44+6.93)/3 = 6.56