Answer the following Q with stream of consciousness. Context: "Old Man" is a song written and performed by Neil Young on his 1972 album Harvest. "Old Man" was released as a single on Reprise Records in the spring of 1972, and reached # 31 on the Billboard Hot 100 singles chart for the week ending June 3.

Question: who wrote old man look at my life?
The relevant sentence in the passage is: "Old Man" is a song written and performed by Neil Young on his 1972 album Harvest. "Old Man" was released as a single on Reprise Records in the spring of 1972, and reached # 31 on the Billboard Hot 100 singles chart for the week ending June 3. Therefore, the final answer is Neil Young.