Submit HW1 and HW2

[Infi-DOS]

Submit HW1 and HW2

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[Nadav138]

Hello @Infi-DOS ! You have two PRs, both with conflicts. Please try to close them both and open new one from new and updated branch. Please include in this PR only the three (or four) HW, without modifications to other files (as now there are few modifications also inn "index.md" files.)