With reference to the $\frac{\text{I}}{O}$ image tables:

a$.$ What information is stored in PLC input and output tables?

b$.$ What is the input status of a closed switch stored as$?$

c$.$ What is the input status of an open switch stored as$?$

d$.$ What is the status of an output that is ON stored as$?$

e$.$ What is the status of an output that is OFF stored as$?$