Answer:
step3:
aluminum- 11.98
copper-12.14
iron- 12.31
lead- 12.46
step5: 12.46, 52.31, 39.85
step7: 100, 22.4, 27.1, 4.7, 72.9
step5: 12.26, 52.49, 40.13
step7: 100, 22.7, 24.6, 1.9, 75.4
step5: 12.42, 52.66, 40.24
step7: 100, 22.5, 24.9, 2.4,75.1
step5: 12.34, 51.99, 39.65
step7: 100, 22.6, 23.3, 0.7, 76.7
step8: 0.90,0.35,0.44,0.12
