A computer system has 6 pages, and it uses aging page replacement algorithm. The counter for each page is an 8-bit counter. The R bits at clock tick 0, 1, and 2 are shown in top row in Fig. 4. Put the counter values in blanks in Fig. 4, at each clock tick. Fig. 5 shows a matrix of n times n bits which is used to Least Recently Used (LRU) Page Replacement Algorithm. There are four pages. The pages in order: 2 1 0 3 Show the status of this matrix after page 2 and 1 are referenced