A Web site requires that users create a password with the following specifications: • Length of 8 to 10 characters • Includes at least one special character • No spaces • May contain numbers (0–9),...

A Web site requires that users create a password with the following specifications:
• Length of 8 to 10 characters
• Includes at least one special character
• No spaces
• May contain numbers (0–9), lower and upper case letters (a–z, A–Z)
• Is case-sensitive.
(a) How many passwords are there?
(b) How long would it take to try all passwords if a password can be tested in 1 microsecond?