3)
 echo
 echo "You have chose to Edit an Existing Entry"
 echo "Enter part or all of a name/phone# or address"
 echo 
 read search
 choiceLine=`grep -i "$search" addressbook.txt`
 oldName=`echo $choiceLine|cut -d ":" -f1`
 oldPhone=`echo $choiceLine|cut -d ":" -f2`
 oldAddress=`echo $choiceLine|cut -d ":" -f3`
 echo "You have chosen to search for : $search"
 grep -v "$search" addressbook.txt > addressbook.tmp
 echo "If you don't wish to change the name, press enter"
 echo -n "The name [ $oldName ] will be changed to: "
 read name
 if [ -z "$name" ]; then
   name=$oldName
 fi
 echo "The previous phone number was: $oldPhone"
 echo "If you don't wish to change the number, press enter"
 echo -en "Please enter a new phone number: "
 read phone
 if [ -z "$phone" ]; then
   phone=$oldPhone
 fi
 echo "The previous address was: $oldAddress"
 echo "If you don't wish to change the address, press enter"
 echo -en "Please enter a new address: "
 read address
 if [ -z "$address" ]; then
   address=$oldAddress
 fi
 echo "${name}:${phone}:${address}" >> addressbook.txt
 ;;

echo "${name}:${phone}:${address}" >> addressbook.txt

echo "${name}:${phone}:${address}" > addressbook.txt