\fC) 58 D) 85 E 86 10. Rainwater was collected in water collectors at thirty different sites near an industrial basin and the amount of acidity (PH level) was measured. The following stem-and-leaf diagram shows the pH values. Decimal point is at the colon 2 : 679 3 : 237789 4 : 1222446899 5 : 0556788 6 : 0233