Pls help solve asap

Mineral Processing In a sorting facilities in a gold mine, ROM (run of mine) is sorted into 5 sets of rocks. The following data is recorded Set # Mass of gold in Set (mg) Mass of rock in Set (kg) 1 18.9 20.1 2 15.3 19.5 3 12.4 20.3 4 8.4 19.8 5 5 5.2 20.2 (2 marks) Determine the percentage of gold in each set. If you are using excel, please give ONE sample calculation (4 marks) Construct a grade recovery curve, provide title for the axis. Show in a table all the values you use to construct the curve and give ONE sample calculation of how you get those values (2 marks) If we want to have at least 80% recovery, which sets should we be accepting? provide explanation using your grade-recovery curve or table above