(a) What is a 'mast raiser' and what is the purpose of it? (6)

(b) A ship 96 m long is floating at 5m fwd draft and 6.4m aft draft. MCTC 180tm, TPC 16. COF is 2m abaft of midships. Find the location where a weight of 50t should be placed so as to keep the at draft constant (10)