Which of these swarm manager configurations will cause the cluster to be in a lost quorum state?

For a Docker Swarm cluster to maintain a quorum, it requires a strict majority of its manager nodes to be healthy. With 4 managers, the minimum number of healthy managers required for quorum is (4/2) + 1 = 3. If only 2 managers are healthy, the cluster falls below the required quorum, leading to a lost quorum state where it cannot perform management operations.

A single manager node, if healthy, maintains its own quorum (1/2 + 1 = 1).

For 3 managers, the quorum is (3/2) + 1 = 2 (rounding up to the next integer for the majority). With 2 healthy managers, the quorum is maintained.

For 5 managers, the quorum is (5/2) + 1 = 3 (rounding up). With 3 healthy managers, the quorum is maintained.