CFAI, Reading 14, Question 13Aii

Can anybody help figure out the calculation of required return here. I understand how investable base and annual cash flow is computed, but I guess I am just a bit rusty on FV calculations. I tried plugging into time value of money calcs, and also using the cash flow function, but I just can’t quite get it right. Any help would be appreciated. Also, it is good to be back on AF. I tend to be more of a lurker in the beginning until I have read all of the material through. Looks like a lot of you are a good bit ahead of me.