Hi, I would like to get some help with these multiple choice questions. Please give intuition

Question 14. According to the single index model, all else held equal, which asset will get the higher expected return? O The one with the higher systematic (market ) risk O The one with the higher idiosyncratic (firm-specific) risk O The one with the higher total risk They must all get the same expected return as the market portfolio Question 15. As I increase the yield to maturity of a bond, all else equal, the bond price will Increase at an increasing rate (increasing and comvex function) Increase at a decreasing rate (increasing and concave function) D Decrease at an increasing rate (decreasing and concave function) Decrease at a decreasing rate (decreasing and convex function) Question 16. As I increase the coupon rate, all else equal, the yield to maturity will O Increase D Decrease Stay constant O It depends on the price Question 17. A bond has more interest rate risk if O its time to maturity is longer D its coupon rate is higher O its yield to maturity is higher D its convexity is higher Question 18. If Sandy and Danny are both mean-variance optimizers with the same information (but possibly different levels of risk aversion), which could be optimal? D Sandy wants to hold more Microsoft stock while Danny wants more Apple stock, but they hold the same amount of T-bills Danny wants more T-bills while Sandy wants more stocks, but their stock portfolio has the same fraction of Microsoft to Apple O Sandy wants a lot of Microsoft with a few T-bills (no Apple) while Danny wants a lot of T-bills with a few Apple (no Microsoft) They must hold the same portfolio