17. Find the address range of the following memory design. AO A14 32Kx8 A15. A16 A17 D A18 A19 CS 18. Using NAND gates and inverters, design decoding circuitry for the address range 0C0000H-OCOFFFH. 19. Find the address range for Y0, Y3, and Y6 of the 74LS138 for the following design. This is the ROM interfacing with the 8088 CPU in the original PC. 74LS138 not used 88Kx8 A0- ROM A13 A YO A12 A14- B Y1 A15- C Y2b CS A16- to Y3b ROM ADDR Select G2A Y4 A19- Y5 MEMR G2B Y6b- Y7 Reset Do G1 -DO D7 20. Using the 74138, design the memory decoding circuitry in which the memo- ry block controlled by YO is in the range 00000H to 03FFFH. Indicate the size of the memory block controlled by each Y