Create a webpage, which use JavaScript $($simpleCalculator$.$js$)$ to do the followings:

a$.$ Displays $2$ textboxes, which should read numbers, and another textbox for the result.

b$.$ Display $4$ buttons that hold the arithmetic operation $+-**$ and $/$ respectively.

c$.$ The user should enter the number in the $2$ textboxes, and then click on a button.

d$.$ The JS should calculate the result and display it in the result's textbox

Now alter the above JavaScript $($simpleCalculator$2.$js$)$ to do the followings:

a$.$ Make sure that the entered numbers are integers

b$.$ Display error message "Cannot divide by ZERO" when the user selects the operation $"/"$ while the $2^{nd}$ number is $0.$

Create a webpage, which uses JavaScript $($geometrics$.$js$)$ to do the followings:

a$.$ Display $3$ radio buttons labeled with "Circle", "Rectangle", and "Right$-$angle Triangle".

b$.$ Under $($or in front of each option$)$ display textboxes to read the sufficient information to calculate the area of each shape

c$.$ When the user clicks on a shape, the script should display the area of the selected shape based on the given information using alert dialog box

Now modify the above script to do the followings:

a$.$ Validate the entries $($in the textboxes$)$ that they are positive numbers $(0$ is not accepted$)$