2) (5 points) The following shell script is used to find the factorial of a given number from user's input. 1 ?/bin/bash num-0 4 on-o fact-1 7 echo-n "Enter number to find factorial" 8 read $num 10 res-$num 11 while $num> 11 12 do 13 14 15 done 16 17 echo "Factorial for $res is $fact" fact-expr fact$num num-$num 1 Which line(s) is(are) incorrect? And how to correct it(them)? Please write down your correction for that line (those lines)