The cross curves of stability (KN-curves) for a certain vessel are given in the following diagram. 7 6 5 KN (METRES) 4 3 2 1 0 60 75 45 I 90 30 15 5 000 KN-curve 6 000 7 000 8 000 9 000 W 10 000 11 000 DISPLACEMENT (TONNES) 12 000 13 000 B A 0 T 14 000 Z B N 15 000 16 000 a) Calculate and plot the stability curve (GZ-curve) for the vessel at a displacement of 4=7800t, with a distance keel to centre of gravity KG=8.0m. b) Determine the angle of vanishing stability. c) Determine the dynamic stability between 15 and 45 heel (for the same displacement as in question a)) in [tm-rad].