A community college classifies a student as a freshman or sophomore depending on the number of credits that the student has earned. Data from the school indicate that from one fall semester to the next 25% of freshman will graduate, 50% will become sophomores, and 25% will quit. Furthermore, 50% of sophomores will graduate, 25% will remain sophomores, and 25% will quit. Use the techniques from lecture 11 to determine the probability that an incoming freshman will graduate.