David and Joan Mead have a home with an appraised value of $195,000 and a mortgage balance of only $95,000. Given that an S&L is wiling to lend money at a loan-to-value ratio of 70 percent, how big a home equity credit line can David and Joan obtain? How much, if any, of this line would qualify as tax-deductible interest if their house originally cost $100,000?