9 24 More sophisticated computer assisted instruction systems monitor the students performance over a period of time The decision to begin a new topic is often based on the students suc cess with previous topics Modify the program in Exercise 9 23 to count the number of correct and incorrect responses typed by the student After the student answers 10 questions, your program should calculate the percentage of correct responses If the percentage is lower than 75 percent, dis play Please ask your instructor for extra help, and reset the quiz so another student can try it so I already did question 9 23 and this is my code but I cant figure out how to add a counter without breaking my code I doing this in javascript in an html file HW3 Q10 var number1 var number2 var correct var wrong var counter function check() var product parseInt(document getElementById( product ) value) if (product number1 number2) switch(Math floor(1 Math random() 4)) case 1 document getElementById( product ) value document getElementById( result ) innerHTML Very good calculation() break case 2 document getElementById( product ) value document getElementById( result ) innerHTML Excellent calculation() break case 3 correct 1 document getElementById( product ) value document getElementById( result ) innerHTML Nice Work calculation() break case 4 document getElementById( product ) value document getElementById( result ) innerHTML Keep up the good work calculation() break default document getElementById( result ) innerHTML else switch(Math floor(1 Math random() 4)) case 1 document getElementById( product ) value document getElementById( result ) innerHTML No Please try again break case 2 document getElementById( product ) value document getElementById( result ) innerHTML Wrong Try once more break case 3 document getElementById( product ) value document getElementById( result ) innerHTML Don't give up break case 4 document getElementById( product ) value document getElementById( result ) innerHTML No Keep trying default document getElementById( product ) value document getElementById( result ) innerHTML function calculation() document getElementById( controls ) style visibility 'visible' number1 Math floor((Math random() 10)) number2 Math floor((Math random() 10)) document getElementById( question ) innerHTML How much is number1 times number2 document getElementById( product ) focus() function idk() document getElementById( controls ) style visibility 'hidden' calculation() LEARN MULTIPLICATION Check

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9-24 More sophisticated computer-assisted instruction systems monitor the students performance over a period of time. The decision to begin a new topic is often based

9-24 More sophisticated computer-assisted instruction systems monitor the students performance over a period of time. The decision to begin a new topic is often based on the students suc- cess with previous topics. Modify the program in Exercise 9.23 to count the number of correct and incorrect responses typed by the student. After the student answers 10 questions, your program should calculate the percentage of correct responses. If the percentage is lower than 75 percent, dis- play Please ask your instructor for extra help, and reset the quiz so another student can try it.

so I already did question 9-23 and this is my code but I cant figure out how to add a counter without breaking my code. I doing this in javascript in an html file.

HW3_Q10