1) https://www.chegg.com/homework-help/questions-and-answers/exercise-2-consider-following-precedence-relationships-processes-p1-p2-p3-p4-p5-p6-ph-p2-p-q37104301
2) https://www.chegg.com/homework-help/questions-and-answers/exercise-3-consider-m-updater-processes-n-browser-processes-concurrently-accessing-databas-q37116380