Challenge 1: Classify Three Scores — Possible Solution
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GIVEN: LCP = 3.2s, INP = 150ms, CLS = 0.3

LCP = 3.2s -> NEEDS IMPROVEMENT
  The chapter's table places LCP in the "Needs Improvement" range for
  anything between 2.5s and 4.0s. 3.2s falls squarely inside that range
  — it's slower than the "Good" threshold of 2.5s or under, but faster
  than the "Poor" threshold of over 4.0s.

INP = 150ms -> GOOD
  The "Good" range for INP is 200ms or under. 150ms is comfortably
  below that threshold, so this metric qualifies as Good.

CLS = 0.3 -> POOR
  The "Poor" range for CLS is anything over 0.25. 0.3 exceeds that
  threshold, placing it in the Poor category — well outside even the
  "Needs Improvement" range of 0.1–0.25.

WHY THIS WORKS
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- Each metric is classified INDEPENDENTLY against its own threshold row
  in the chapter's table — there's no combined "overall score" being
  calculated here, just three separate lookups.
- This result also illustrates a realistic scenario: a page can have a
  genuinely responsive interaction experience (good INP) while still
  suffering from slow initial rendering (LCP) and significant visual
  instability (CLS) — the three metrics measure different qualities of
  the page experience and don't move in lockstep with each other,
  which is exactly why Core Web Vitals tracks all three separately
  rather than a single blended number.