If you're here because of your uni assignment, I hope I've saved you a lot of time. This question was designed by a dumbass. I can't explain it here so you'll either have to understand it yourself or contact me.

Question so people searching for it will find it:

Design an address decoding circuit for two 4Kx8 RAM chips with the starting address from 2050H for a microprocessor having 16 bit address lines.