以下是在官网找到的MSA PROGRAM GUIDE,求问这个算是先修课程么.....? MSA FOUNDATION COURSE REQUIREMENTS (6 CREDITS) Course Title  rerequisite PRE-PROGRAM FOUNDATION COURSES: PPF 501 Statistics (3 credits) None PPF 502 Economic Environment of the Firm (3 credits) Pre or Co-Req: PPF 501