In pure on-demand paging, a page replacement policy is used to manage system resources. Suppose that a newly-created process has 3 page frames allocated to it, and then generates the page references indicated below. A B C B A D A B C D A B A C B D How many page faults would occur with FIFO page replacement? How many page faults would occur with LRU page replacement? How many page faults would occur with Optimal page replacement?