Checkpoint: Dispatch Desk

The Dispatch Desk decides how an order is handled, combining nested logic with a switch expression. Write public static String dispatch(String tier, int weightKg, boolean fragile): 1. If weightKg <= 0, return "rejected: bad weight". 2. Otherwise classify by tier using a **switch expression**: - "standard" → "standard-" + weight class, where weight class is "light" (weight < 5) or "heavy" (5 and above); - "express" → "express-" + weight class (same classes); - "freight" → "freight-quoted" (weight class ignored); - any other tier → "rejected: unknown tier" (regardless of weight). 3. Fragile orders get "+" appended at the very end — but ONLY if the result is not a rejection. dispatch("standard", 3, true) is "standard-light+"; dispatch("gold", 3, false) is "rejected: unknown tier" with no plus. The boundary at 5 belongs to "heavy". Build the result with a String variable, then decide the suffix once.

Difficulty: beginner