The HAL computer has 4 frames. The time of loading, time of last access, and R and M bits are shown below(time in clock ticks):

Show all compution!.

Page Loaded            Last Ref.           R            M

0          280                   390             1           1

1          115                   375             1           1

2         190                    290             0           0

3          150                  350              0           0

A) which page will NRU replace?

B) which page wil FIFI replace?

C) which page will LRU replace?

D) which page will second chance replace?