You are presented with the following surface weather chart from Environment Canada 093 - 10 1012 18 1014 11 021 12 75172 12 100 061 12 065 10% 106 977 99532%. 15 12 11 969 15 #17 109 12 063 1008 105 102 1002 122 56 10 12 169 12 13 18 591 ENVIRONNEMENT CANADA CMC ENVIRONMENT CANNON BAR SCALE: ANAL SURFACE 12Z SAT-SAM 07 AUG-AOU 21 G3PL JAC 12 632 kilometres JAC 1. Use your ruler (measure as best you can to tenths of a millimetre) and the bar scale given above to calculate the straight-line distance between Points A and B. Be certain to show all calculations and units and leave your final answer to an appropriate number of significant figures. 2. A cold front has just arrived at Point A and is predicted to arrive at Point B in 21 h. At what velocity (in km/h) is this front moving? Again, leave your final answer to an appropriate number of significant figures