Please help me with this question!

5. Brute force attacks (15 points). 5.1 A simple device uses 4-digit integers (from 0000 to 9999) as pins for authentication. Pins are hashed and stored in a password file. Chuck obtains the password file and attempts to use the brute force attack to find Alice's pin. Chuck uses a computer with 8-core CPU running at 4GHZ. It takes 100 cycles (on one core) to generate a hash for a pin. In the worst-case scenario, how much time (in seconds) will it take to find Alice's pin