Answer:
The expected return that IMI can provide subject to Johnson's risk constraint is 8.5%
Explanation:
Capital Market Line (CML)
Expected return on the market portfolio, E([tex]r_m[/tex]) = 12 %
Standard deviation on the market portfolio, σ[tex]_p[/tex] = 20%
Risk-free rate, [tex]r_f[/tex] = 5%
E([tex]r_c[/tex]) = [tex]r_f[/tex] + [ E([tex]r_p[/tex]) - [tex]r_f[/tex] ] × ( σ[tex]_c[/tex] ÷ σ[tex]_p[/tex])
= 0.05 + [ 0.12 - 0.05] × (0.10 ÷ 0.20)
= 8.5%