To solve this problem and calculate the security's equilibrium rate of return, you should sum the security's default risk premium (2.00%), the inflation risk premium (1.75%), the real risk-free rate (3.50%), the security's liquidity risk premium (0.25%) and the maturity risk premium (0.85%). So, you have:
ij*=2.00%+1.75%+3.50%+0.25%+0.85%
ij*=8.35%