Can you please tell me where I'm making my mistakes at.
declare -iGrade1
read -p Please enter your first grade: Grade1 Grade1
if [ $Grade1 -ge 90 -a $Grade1 -le 100]
then
read -p Enter Grades Grades
echo A
then
declare -iGrade2
read -p Please enter your first grade: Grade2 Grade2
if [ $Grade2 -ge 89 -a $Grade2 -le 80]
then
read -p Enter Grades Grades
echo B
then
declare -iGrade3
read -p Please enter your first grade: Grade3 Grade3
if [ $Grade3 -ge 79- a $Grade3 -le 70]
then
read -p Enter Grades Grades
echo C
then
declare -iGrade4
read -p Please enter your first grade: Grade4 Grade4
if [ $Grade4 -ge 65-a $Grade4 -le 69]
then
read -p Enter Grades Grades
echo D
then
declare -iGrade5
read -p Please enter your first grade: Grade5 Grade5
if [ $Grade5 -ge 0 -a $Grade5 -le 64]
then
read -p Enter Grades Grades
echo F
fi
then
if [[ GRADE1= A || GRADE2= B || GRADE3= C || GRADE4= D || GRADE5= F ]]
then ((Average=($Grade1 + $Grade2 + $Grade3)/3))
