"Happy Family" plans to buy a house in four years. Experts in this area have estimated that the cost of real estate will increase at a rate of 7% per year during that period. This family can make investments that give them a 12% return. If the economic predictions are valid,

a. How much will they have to pay for a house that now costs $ 150,000?

b How much will they have to deposit monthly so that after those four years they can buy it?