Write a shell script to find the sum, the average and the product of the four integers entered
echo Enter four integers with space between read a b c d sum=`expr $a + $b + $c + $d` avg=`expr $sum / 4` dec=`expr $sum % 4` dec=`expr \( $dec \* 1000 \) / 4` product=`expr $a \* $b \* $c \* $d` echo Sum=$sum echo Average=$avg.$dec echo Product=$product