if I understand correctly

neighbors truck = n

your truck = m

m >= n+500

m<= 1/4(4n)

so, if we simplify the second one

m<=n

this isn't possible because the first equation contridicts this statement, so it's no solution?

While I think guest is right, I believe 0 and 1 can also work since they both have 1 as their answer.

area of the shape.