A investor's price for a commercial plaza suit was $150000 Ramin, the buyers of the rental unit, financed the money by making equal payments at the end of every six months for 25 years. Interest is 4.8% compounded semi-annually. a) What is the size of the semi-annual payment? b) How much Ramin still. owe after 16 years? ( Money up to 2 d.p. )