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a. init a repository

a. init a repository git init b. perform three commits with three different messages, git commit -am "3 different message" c. add a remote repo (can be a dummy one) git remote add repo https://github.com/vikychoi/comp3111_lab2.git d. checkout the first commit git check ef4e9e12c e. checkout the last commit git checkout 2bfe513 / git checkout master