- 0u invest 1000 for 5 years. - For the first six months after you make this investment, the accumulation function is given by a(t)=1+0.04t2 - Between time t=0.5 and the end of year two, the effective rate of discount is 7%. - During year three, the force of interest is 5%. - During year four, the nominal rate of discount convertible monthly is 9%. - During year five, the nominal rate of interest convertible monthly is 6% What is your yield rate for the five year period