Build a simple buffer manager

Implement a buffer manager that manages a buffer of blocks in memory including reading/flushing to disk and block replacement (flushing blocks to disk to make space for reading new blocks from disk) You should implement a buffer manager in this assignment. The buffer manager manages a fixed number of pages in memory that represent pages from a page file managed by the storage manager implemented in assignment 1. The memory pages managed by the buffer manager are called page frames or frames for short. We call the combination of a page file and the page frames storing pages from that file a Buffer Pool. The Buffer manager should be able to handle more than one open buffer pool at the same time. However, there can only be one buffer pool for each page file. Each buffer pool uses one page replacement strategy that is determined when the buffer pool is initialized. You should at least implement two replacement strategies FIFO and LRU. Your solution should implement all the methods defined in the buffer_mgr.h header explained below.