2) (5 points) The following shell script is used to find the factorial of a given number from user's input # ! /bin/bash 3 um0 5 fact-1 7 8 echo -n "Enter number to find factorial :" read Snum 10 res $num 11 while [ $num > 1] 12 do 13 14 15 done 16 17 echo "Factorial for Sres is ?fact" fact- expr fact *num num-$num - 1 Which line(s) is(are) incorrect? And how to correct it(them)? Please write down your correction for that line (those lines)