Within a few days of the release of the Ashley Madison password files, about $4000$ passwords were cracked. Using the numbers from part a$),$ and assuming the same rate of success, how many passwords could have been cracked in this same amount of time, assuming that MD$5($with salting$)$ had been used instead of bcrypt$?$ The article also states that if MD$5$ had been used, it would have taken $$only$3\mathrm{.}7$ years to crack all of the passwords. Explain any discrepancy between this number and your estimate.