(1)5000×4.5%×3=225×3=675(元)675×5%=33.75(元)(2)5000+675-33.75=5675-33.75=5641.25(元)答:到期支取时,王爷爷要缴纳33.75元的利息税,最后王爷爷能拿到5641.25元钱.