Advanced Topics in Database Activity 1 Assume that you have a Students dataset stored on the HDFS. The dataset contains text files, each text file has the following information (comma separated): studentID, course_name, grade , each file may contain several students, and for the same student there are multiple lines, each line contains student's grade in a particular course. Dataset Sample: 19, web, 85 19, Database , 90 20, web, 90 24, Java , 87 23, Java, 88 24, algorithms , 87 23, algorithms, 88 Write a MapReduce job that reads the input files that contains student information, generate student average in the format student_id, average for example 19, 87.5