Write a program that allows students to schedule appointments at either 1, 2, 3, 4, 5, or 6 o’clock p. m. use an array of six strings to store the names for the time slots. write a loop that iterates as long as the array has a free space. within a try block, allow the user to enter a time and a name.

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Function tipcalculate (slider, bill){  var tip = document.getelementbyid('tipamount');   var slideval = document.getelementbyid('slideval');   var bill = document.getelementbyid(bill).value;   var prcnt = slider * .01;       if (bill == null || bill == '') {      tip.innerhtml = ' enter an amount';       return false;   }  if(isnan(bill)) {      tip.innerhtml = ' enter a number';       return false;   }  if(bill > = 0){      tip.innerhtml = '$' + (bill * prcnt) .tofixed(2);   slideval.innerhtml = slider + '%';   }}