I am new to shell scripting and doing a similar thing @ work

Stan:Smith:Detroit:MI
Jim:Jones:Farmington Hills:MI
Jack:Frost:Denver:CO
Sue:Apple:New York:NY
Cindy:Thompson:Battle Creek:MI
John:Smith:Denver:CO
George:Jones:New York:NY

Need to create a shell script This script will display the following information in a menu format:
L – Print Last Names
F – Print First Names
C – Print First Name, Last Name sorted by city
S – Print First Name, Last Name, State sorted by state
Q – Exit the program

The script will perform all of the actions listed above on your file and loop until Q key is pressed.

I did the below but not working…

Code:
loop=y
while [ “$loop” = y ]
do
clear
tput cup 3 12; echo “P – Print Last Name”
tput cup 10 9; echo “Q – Quit: “
tput cup 10 19;
read choice || continue
case $choice in
[Pp]) less ~/export/home/mathews/homework2;;
[Qq]) exit ;;
*) tput cup 14 4; echo “Invalid Code”; read choice ;;
esac
done

Please help

I am new to shell scripting and trying to do the below

Stan:Smith:Detroit:MI
Jim:Jones:Farmington Hills:MI
Jack:Frost:Denver:CO
Sue:Apple:New York:NY
Cindy:Thompson:Battle Creek:MI
John:Smith:Denver:CO
George:Jones:New York:NY

Need to create a shell script This script will display the following information in a menu format:
L – Print Last Names
F – Print First Names
C – Print First Name, Last Name sorted by city
S – Print First Name, Last Name, State sorted by state
Q – Exit the program
The script will perform all of the actions listed above on your file and loop until Q key is pressed.

loop=y
while [ “$loop” = y ]
do
clear
tput cup 5 15
echo -n “People Database”
echo -n “====================================”
tput cup 8 12
echo -n “L-Print Last Names”
tput cup 9 12
echo -n “F-Print First NAmes”
tput cup 10 12
echo -n “C-Print First Name, Last Name sorted by city”
tput cup 11 12
echo -n “S-Print First Name, Last Name, State sorted by state”
tput cup 12 12
echo -n “Q-Exit the program : “
tput cup 12 32
read value || Continue
case “$value” in
[Ll]) ./lastnames ;;
[Ff]) ./firstnames ;;
[Cc]) ./sort_city ;;
[Ss]) ./sort_state ;;
[Qq]) exit ;;
*) tput cup 14 4 ; echo “Invalid choice”; read value ;;
esac
done

When i try to execute this the case l,f,c and s donot execute corresponding scripts… only case Q works fine… All other scripts are executed when directly run from command prompt… What am i missing?