If the cell value is 0:
Minimum is -10.00
Maximum is 10.00
Alpha is 2
Beta is 3
Otherwise:
Minimum is cell value - (absolute cell value divided by 10)
Maximum is cell value + (absolute cell value divided by 10)
Alpha is 2
Beta is 3
For out-of-range values, such as ±1e300:
Minimum is 0
Maximum is 1
Alpha is 2
Beta is 3