This digital logic problem was solved at least partially incorrectly. How would it be solved correctly?

Consider the RAM circuit shown below

Note: $\text{'}$b$\text{'}=$ bits

Note: Only partial $3$:$8$ decoder outputs shown. Be careful!

a$)(4$ points$)$ What is the effective size of the above memory system

b$)(2$ points$)$ What is the value of K $?$ c$)(4$ points$)$ What is the address range for each chip in binary?