Each person is (name, age). Write by_age(people) that sorts them from youngest to oldest.
by_age([['Asha', 30], ['Om', 21], ['Ravi', 25]]) → [['Om', 21], ['Ravi', 25], ['Asha', 30]]
by_age([]) → []
Submit runs 4 tests, including hidden edge cases.
Each hint gives a little more help. Try on your own first.
Run your code to see the output here.