Two equal-sized samples of crushed apple are put by a student into two beakers, P and Q. To beaker P, she pours in 5 cm$^3$ of pectinase solution, while she adds 5 cm$^3$ of water to beaker Q. After 5 minutes, she transfers the crushed apple samples to two separate filter funnels, then records the volume of juice passing through from each sample during a 10-minute period. Which graph shows the results?