Concept:Determine the relative positions to find the leftmost and rightmost persons.
Explanation:From "A is to the left of B but on the right of C": C is left of A, A is left of B → order: C, A, B.
From "D is to the right of B but on the left of E": B is left of D, D is left of E → order: B, D, E.
Combining: C, A, B, D, E.
The extremes are C (leftmost) and E (rightmost).
Answer:C and E