Question: Write the necessary code between that calculates user grades. The script should display (alert) the message as follows: 1. If the input is empty, then

 Write the necessary code between that calculates user grades. The script

Write the necessary code between that calculates user grades. The script should display (alert) the message as follows: 1. If the input is empty, then "Calculate button should display a message "The input is empty - Grades cannot be calculated". 11. If the input is a -ve number, then Calculate button should display a message "The input is -ve - Grades cannot be calculated". m. If the input is >=0 and = 50 and |-hl> Calculate Grades |p>Please type marks between 0 and 100

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