A circular queue of size 5 has 3 elements 10, 20 and 40 where F=2 and R=4. After inserting 50 and 60, what is the value of F and R. Now, insert 30 in the queue, and explain what will happen? Delete 3 elements from the queue and insert 70, 80 and 90. Show the sequence of steps with necessary diagrams with the value of F and R.