WORD PROBLEM: The vi-Kings Tailgate owns a lot near the Vikings stadium and offers parking for both cars and buses on Minnesota Vikings game day. A car requires 6 square meters of space to park, while a bus requires 30 square meters of space. The available parking area in the lot is 600 square meters. The attendant can handle no more than 60 vehicles before a game.

Let X = number of cars that can park in the lot.
Let Y = number of buses that can park in the lot.

Constraints:
Number of cars cannot be negative. Write the inequality
Number of buses cannot be negative. Write the inequality

What would be the inequality(s) for the two constraints? (the number of cars & the number of buses?)