Some security consultants working in the financial domain are cur- rently advising a client who is investigating a potential money-laundering scheme. The investigation thus far has indicated that n suspicious trans- actions took place in recent days, each involving money transferred into a single account. Unfortunately, the sketchy nature of the evidence to date means that they don't know the identity of the account, the amounts of the transactions, or the exact times at which the transactions took place. What they do have is an approximate time-stamp for each transaction; the evidence indicates that transaction i took place at time tite, for some "margin of error" e. (In other words, it took place sometime betweent e and t et) Note that different transactions may have different margins of error. In the last day or so, they've come across a bank account that (for other reasons we don't need to go into here) they suspect might be the one involved in the crime. There are n recent events involving the account, which took place at times xi,xz, . . . , x,. To see whether it's plausible that this really is the account they're looking for, they're wondering