If fifo page replacement is used with four page frames and eight pages (numbered 0–7), how many page faults will occur with the reference pattern 427253323126 if the four frames are initially empty? which pages are in memory at the end of the references? repeat this problem for lru.

only #2 represents an object at rest on a table.

in #1, there is no normal force due to the table; the object is accelerating downward.

in #3, the vertical forces are not balanced; the object is accelerating downward.

in #4, neither the vertical nor the horizontal forces are balanced. the object is accelerating upwards and to the right.