Amiddle school is expanding to open a high school next year, doubling the total number of students. the school keeps a database in which each student's unique id number is stored as an 8 bit number called studentid. before the arrival of the new students almost every 8 bit number has already been assigned to a student. of the options provided below, which is the smallest change to the way studentid is represented necessary to ensure each incoming student receives a unique id