Jenny needs to record the names of 30 students, write down the subjects they studied, and note grades in each subject after the mid semester exams and the end of semester exams. she divides the midsemester and end of semester information into two separate worksheet sheet one and sheet two how will she rename the two worksheets ?

Implement a document scanning function wordcountengine, which receives a string document and returns a list of all unique words in it and their number of occurrences, sorted by the number of occurrences in a descending order. if two or more words have the same count, they should be sorted according to their order in the original sentence. assume that all letters are in english alphabet. you function should be case-insensitive, so for instance, the words “perfect” and “perfect” should be considered the same word.