Four visits occur at 09:05, 09:20, 09:35 and 09:50. Ada arrives before Ben; Cleo is last; Ben is not second. Who is second?
Hint 1 · Place the fixed visit
Cleo is last, so begin by fixing the fourth position.
Hint 2 · Eliminate the impossible slot
Ben cannot be second, and Ada must appear before Ben.
Hint 3 · Show the reasoning
Ada must be first, Cleo fourth and Ben third, leaving Dara second.
