Consider the following questions.

Then for each question, execute a command, using conditional evaluation, that yields the answer.

1. Is the '/usr/sbin' directory writable to you?

2. Is the file '$HOME/bin/submit' executable?

3. Is the file '/usr/bin/printf' older than '/bin/echo'?

4. Is the string "$PATH" of zero length

5. Is the string "$USER" have a non-zero length

6. Does the string "apple" come first before "oranges"

7. Is the strings "$SHELL" and "$BASH" the same length?