For the first task, you are required to know how to fork this repository and clone it to your device and then push back any changes (by sending a pull request).
Open the Contributors.txt file in the parent folder and then change the file on your device by adding your roll number next to your full name (refer to the coordinator names for examples). While you're at it, if you find any spelling mistakes in your name, feel free to correct them. Once you're done editing, send a pull request by adding, committing and then pushing your edited file onto the DiceForge repository.