Some simple *nix tasks

Note: The repository for this assignment is https://github.com/Grinnell-CSC282/hw1-2017S.

Find good solutions to each of the following tasks. (That is, write a program or command to solve the task.) Put them in a folder with your name in the GitHub repository.

• Given a DOS-formatted text file (lines end with \r\n rather than just \n), convert it to a standard text file.
• Given a standard text file, convert all uppercase letters to lowercase.
• Given a standard text file, remove all blank spaces at the end of lines.
• Make a list of all misspelled words in a text file.
• Given a CSV file in which each line has the form
  LastName,FirstName,Assignment,NumericGrade
  find the the five highest grades on homework 2.
• Given an HTML file, find the URLs of all images. In case you don’t know HTML, those will typically look like
  <img ... src="*URL*" ...>
  • The img can have any capitalization (img, IMG, Img, iMg, etc.)
  • There can be other text between the img and the src. (That text cannot include a greater than sign.)
  • You may find it easier to start this problem by assuming that there’s only one image tag on a line.