(a) With aid of a sketch explain the construction of a piston. (b) Three [3] purpose of pistons. [8 marks] (c) Four [4] purposes of piston rings. [6 marks] [8 marks] QUESTION TWO A. Identify the components labelled A, B, C, D, E, F, G, H, I, J, K, L, M, N, O in the below. [15 marks] B. State material used in the construction of part (N) for Heavy Equipment engines. [2 marks] C. Give a reason for your answer in (B) above. [3 marks]