Highest Score That's Still a Fail

The arcade machine taunts you with the closest miss: the top score that still didn't reach the prize line. 🕹️

You get a list of scores and the passmark. Print the highest score that is BELOW the passmark, or none if every score passed.

Example:

Input: scores = [80, 95, 70, 99], passmark = 90 Output: 80

95 and 99 passed, so they're disqualified. Among the failing scores (80, 70), the highest is 80.