PLEASE HELP! WILL GIVE BRAINLIEST!!!!!

Patrick did an experiment to study the solubility of two substances. He poured 100 mL of water at 20 °C into each of two beakers labeled A and B. He put 60 g of Substance A in the beaker labeled A and 60 g of Substance B in the beaker labeled B. The solution in both beakers was stirred for 1 minute. The amount of substance left undissolved in the beakers was weighed. The experiment was repeated for different temperatures of water and the observations were recorded as shown.


Experimental Observations:

Substance: 20 °C 40 °C 60 °C 80 °C

Mass of Undissolved Substance at Different Temperatures (gram):
A: 5 10 14 18
B: 60 60 60 60

Part 1: Which, if any, substance is soluble in water?
Part 2: Explain how the data helped you determine solubility for both substances for temperatures 20 °C to 80 °C.