Four years ago, David Robertson purchased $200$ shares of Harrison Microchips. At the time, each share of Harrison Microchips was selling for $$40.$ He also paid a $$22$ commission when the shares were purchased. Now, four years later, he has decided it's time to sell his investment. Harrison Microchips's share price when sold was $$52\mathrm{.}50.$ In addition, he paid a $$34$ commission to sell his shares. He also received total dividends of $$2\mathrm{.}20$ per share over the four$-$year investment period.

a$.$ What was the total return for Mr$.$ Robertson's investment?

b$.$ What is the annualized holding yield for his investment?