Wasif Khan has signed up to various websites using the same password. His password to all these sites is WasifKhan. You want to hack Wasif$$s accounts and run a brute force attack attempting all alphanumeric characters on a $2$ GHz CPU with each attempt taking $100$ clock ticks. Attempts will be ordered from shortest to longest, ie$.$ attempting all passwords of length $1,$ then $2,$ and so on$.$ a$)$ How long would a brute force attack take to hack his password? $[5$ marks$]$ b$)$ Describe two hardware improvements that could be made to decrease the time taken to crack the password? $[1$ marks$]$ c$)$ Describe a concept in security that could be leveraged to decrease the time taken to crack the password? $[1$ mark$]$