Linux commands

Question3: Assume (create the following files are in the working directory: $ Is book notesb ref2 lect lec3 lec45b notesa reft ref3 lec2 lecta ben Provide commands for each of the following using wildcards to express filenames with as few characters as possible. a. From this directory show the list all files that begin with " b. From this directory show the list of only lec1, lec2 files From this directory show the list of the file ending with "b" d. From this directory show the list of all the files having two numbers in their name e. From this directory show the list of all files with names of exactly 3 characters long