Final answer:
The Cars, led by Ric Ocasek, had the hit song "Just What I Needed" which they performed in Central Park in 1979.
Step-by-step explanation:
The band led by Ric Ocasek that had a hit with the song "Just What I Needed" in Central Park in 1979 is The Cars. "Just What I Needed" is a well-known track by The Cars that appeared on their self-titled debut album released in 1978. The Cars were a prominent band during the late 1970s and 1980s known for their new wave and rock music, with Ric Ocasek as the lead vocalist and rhythm guitarist.