Every e-mail message carries about 500 bytes of data on where it came from, what software created it, what route it took to its destination, and more. Suppose a company has 1,000 employees, each of whom receives an average of 50 messages per day. (Some receive hardly any, but others receive many more than 50.) The firm saves this information in case it is needed later to analyze a security threat, though it does not save message text or attachments. How long will it take for the firm to accumulate a gigabyte of e-mail header data? How much data will it have after one year