$3.$ Encircling the correct answer below.

a$)$ To prevent the write failure, $($AX $/$ PU $/$ PD$)$ should be stronger than $($AX $/$ PU $/$ PD$).(5$ pts$)$

b$)$ To prevent the read failure, $($AX $/$ PU $/$ PD$)$ should be stronger than $($AX $/$ PU $/$ PD$).(5$ pts$)$ c$)$ The following description provides an explanation of SRAM operation. Fill in the blanks using either the net name or voltage indicated in the figure above. $(10$pts$)$

Read operation:

$1.$ Set the BL to and the BLB to

$2.$ Activate a

by setting it to

$3.$ Measure the voltage difference between the

and

Write operation:

$1.$ Set

and based on the data.

$2.$ Activate a by setting it to