Knights always tell the truth. Rogues always lie. There are 100 people on an island, and each is either a knight or a rogue. Four of them make statements: Alice: "The number of Knights is a multiple of four." Bob: "Exactly one out of Alice, Donald, and I is a Rogue." Carl: "Alice and I are of the same type." Donald: "There are at most 90 Knights." Let X be the number of Knights there are. How many possible values are there for X