Can you please explain how to solve these problems? The answers are already there but

I have no idea how to get the answers.

Q: Analyzing memory interfacing circuit for an 8088(8bit bus)

ADDRESS BUS A19 A18 A0-A17 A0-A15 CS CS ROM RAM DO- D8 DO - D8 DATA BUS RD,WR RD,WR Control BUS a) The size of the RAM is_64_Kbytes b) The size of the ROM is_256_Kbytes. c) ROM memory map (only one possible set of the solutions is sufficient): From C0000HTo FFFFFH d) RAM memory map (only one possible set of the solutions is sufficient): From_00000H To _OFFFFH ADDRESS BUS A19 A18 A0-A17 A0-A15 CS CS ROM RAM DO- D8 DO - D8 DATA BUS RD,WR RD,WR Control BUS a) The size of the RAM is_64_Kbytes b) The size of the ROM is_256_Kbytes. c) ROM memory map (only one possible set of the solutions is sufficient): From C0000HTo FFFFFH d) RAM memory map (only one possible set of the solutions is sufficient): From_00000H To _OFFFFH