Answer
This is the case of a person who wants to take risk. So, for every 100 dollars of own funds, he will borrow 127.78 dollars, and invest 227 dollars in a risky asset.
The answer and procedures of the exercise are attached as an image.
Explanation
lease consider the data provided by the exercise. If you have any question please write me back. All the exercises are solved in a single sheet with the formulas indications.