$3.$ Read the provided code, and then answer the following questions:

$1$ #Read the user's number

$2$ num $=$ int$($input$("$Enter a number:" $))$

$3$

$4$ #Add the number to itself, then square the result

$5$ num$1=$ num $+$ num

$6$ num$2=$ num$1*$ num$1$

$7$

$8$ #print the result

$9$ print$("$The original number was" $,$ num, "The new number is$",$ num$2)$

$($a$)$ Which of these lines are comments? $($Write the line numbers$)$

$($b$)$ Which of these lines utilize an arithmetic operator? $($Write the line numbers$)$

$($c$)$ Which lines use either input or output? $($Write the line numbers$)$