66.7 65.2 71.5 67.4 81. 72.6 70.4 80.3 76.3 74. 75.1 77.5 64.3 62.7 69.5 75.3 75.1 75.2 79.4 72.3 Above table is Engineering students marks in year wise a) Find year wise average marks b) Total marks along with average c) Find each students aggregate.