a)PV=K(1+r)n+H(1+r)n=9(1+0.06)12+109(1+0.06)12=4.47+54.17=58.64PV=\frac{K}{(1+r)^n}+\frac{H}{(1+r)^n}=\frac{9}{(1+0.06)^{12}}+\frac{109}{(1+0.06)^{12}}=4.47+54.17=58.64PV=(1+r)nK+(1+r)nH=(1+0.06)129+(1+0.06)12109=4.47+54.17=58.64
58.64×0.25+58.64=73.358.64\times0.25+58.64=73.358.64×0.25+58.64=73.3
b)PV=K(1+r)n+H(1+r)n=9(1+0.005)0.1667+109(1+0.005)0.1667=8.99+108.91=117.90PV=\frac{K}{(1+r)^n}+\frac{H}{(1+r)^n}=\frac{9}{(1+0.005)^{0.1667}}+\frac{109}{(1+0.005)^{0.1667}}=8.99+108.91=117.90PV=(1+r)nK+(1+r)nH=(1+0.005)0.16679+(1+0.005)0.1667109=8.99+108.91=117.90
r=r12=0.005r=\frac{r}{12}=0.005r=12r=0.005
n=n12=212=0.1667n=\frac{n}{12}=\frac{2}{12}=0.1667n=12n=122=0.1667
117.90×0.25+117.90=147.38117.90\times0.25+117.90=147.38117.90×0.25+117.90=147.38
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