P.3.1 - can I get more explanation about lower/upper bound?

That worked! Thanks!
p.s)
I think P.3.2 has a typo in the explanation of the desired output.

Current:
“”"
Returns:
[(float, float)]: a list of phase windows for 1 to 9
estimation wires
“”"

Fixed:
“”"
Returns:
[(float, float)]: a list of phase windows for “2” to 9
estimation wires
“”"