Each of the following mortgage loans is for $155,000. The closing costs on each loan will be $4,200, and all points will be paid by the buyer. Which loan requires the most money to be paid up front at closing?

1. Adjustable-rate mortgage: 5 percent interest with 2 points

2. FHA-insured mortgage: 7 percent interest with 1 point

3. Conventional mortgage: 8 percent interest with 0 points

4. All require the same amount at closing.