Please solve number $28$ and $29$

How many address lines are required to access $64K8$ RAM?

a$)10$

b$)14$

c$)16$

d$)8$

$7$

To build a RAM of size $64M8$ using RAM ICs $($Integrated Circuits$)$ of size $512K8,$ then we need:

a$)128$ICs

b$)256$ICs

c$)512$ICs

d$)64$ICs