Please fill in the blanks

3) (9 points) The following shell script is used to check if the input IP address is invalid or not. Hint: grep returns 0 if a pattern is found. F8-1 while Srs -gt o i do clear echo -n Please input the ip: read ip #use grep to check if the input IP address follows the IP address pattern A. 18IP- if t SisiP c.-] ; then isvalid-1; # loop over the words in string ip for i in -;do n-echo sip | cut -d. -fri if [ Sn -gt 255 -o li then echo "ERROR: The number of the IP should not be greater than 255 and less than o fi done if fi li then echo "-This is a valid IP-" else echo -ERROR: The IP format you input is wrong, the format should be like 192.168.100.1 fi echo echo-n Press 0 to exit and other numbers to continue. . ." read rs done