Your friend is trying to remember a $10-$digit phone number. You point out that the area code of the number is the same as hers. She notices that the last two numbers are her birth year. Considering the average number of information bits one can store in short$-$term memory, should we expect her to remember this phone number?

a$.$ No$,$ because $10$ digits is more than the average number.

b$.$ Yes, because there are actually seven information bits.

c$.$ No$,$ because the middle five numbers are too big for an information bit.

d$.$ Yes, because maintenance rehearsal will ensure encoding.