psasir.upm.edu.mypsasir.upm.edu.my/id/eprint/77596/1/STRENGTHENING_THE_SAFET… · a part-time...
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psasir.upm.edu.mypsasir.upm.edu.my/id/eprint/77596/1/STRENGTHENING_THE_SAFET… · a part-time rider to earn extra money during his spare time. In a day, he can earn up to RMI 50