Final answer:
The least possible quota in a weighted voting system with weights 5,4,3,2,1 is 8.
Step-by-step explanation:
The least possible quota in a weighted voting system is the sum of the weights divided by 2, plus 1.
In this case, the weights are 5,4,3,2,1, so the least possible quota would be (5+4+3+2+1)/2 + 1 = 8.