Laura wants to buy a condominium that costs $90,000. The bank requlres a 10% down payment. The rest is financed with a 15 -year, fixed-fate mortgage at 45 it annual interest with monthly payments. Complete the parts below. Do not round any intermediate computations. Round your final answers to the nearest cent if necessary, If necessary, refer to the lith of fingncialfsmulas. (a) Find the required down paytwent. (b) Find the amount of the mortgsge