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→INVESTIGATION 1: ADDITIONAL LOGIC STATEMENTS
# Save your editing session and exit the text editor (eg. with vi: press '''ESC''', then type ''':wx''' followed by '''ENTER''').<br><br>
# Issue the following linux command to add execute permissions for your shell script:<br><span style="color:blue;font-weight:bold;font-family:courier;">chmod u+x if-5.bash</span><br><br>
# Run your shell script by issuing: <span style="color:blue;font-weight:bold;font-family:courier;">./if-5.bash</span><br><br>What do you notice? Run several times to confirm that the shell script runs correctly for all mark (grade) categories.<br><br>
