In-class Exercise 3. You have been tasked with developing a gradebook script. The script will be used to analyze how students perform on tests. You will be given an array full of test scores varying from 0 to 100. The size of the array will vary You must create a series of functions that can: find the mean of the scores, find the median of the scores, find the highest score, find the lowest score, and determine a 'curve' that will raise (or lower) the mean score to 90 points. (The curve will be a flat amount of points added to each grade) Requirements onsoclee the tasis described above. Display the mean, median, highest score, lowest score and curve, (hint for the curve.: help length) The test scores MUST be stored in a variable named testScores that you define at the top of your script. / will test your scripts using grades Igenerate after class. (While developing your script feel free to fill in whatever values you want for testscores, however I will overwrite these when test it) b) c)