Write an SQL expression for each of the following operations:

a) Find the ID of students whose name starts with B (e.g., Brian, Betty).

b) Find the largest student ID.

c) For each course (identified by course ID), count the number of students enrolled in it.

d) Display all student records in alphabetical order of student name.

Consider a student database with the following schema: Students (SID, sName); Courses (cID, Name); Enrolled (sID, ID, sectID, grade) where foreign key (SID) references Students, foreign key (CID) references Courses