Mack Liu@liumackFollow BadgesProblem SolvingJavaPythonDays of JSDays ofStatistics CertificationsCertificate: Problem Solving (Intermediate)VerifiedskillCertificate: Problem Solving (Basic)VerifiedskillWork Experienceliumack has not updated employment details yet.Educationliumack has not updated education details yet.Linksliumack has not updated links details yet. Skillsliumack has not updated skills details yet.