An online account password for a certain website consists ofeight characters, where at least one must be a digit (i.e. a numberfrom 0-9).
a. How many different passwords are possible if only lowercaseletters and digits can be used?
b. How many different passwords are possible if a user wants toinclude single capital letter somewhere in their password?
c. If a computer program randomly generates eight characters(such that each could be either a digit or any lowercase letter),what is the probability that a valid password is generated?
