Dummy Predictor Variable and Multiple Regression Disccussion

You are to explain how  orthogonal coding of dummy variables differ from dummy coding and effect coding? Identify a research question from your professional life or research interests that could be addressed with dummy predictor variables in multiple regression. Specify the type of coding used. Identify the predictor variable and outcome variable. Articulate the expected outcome of the regression.

I have attached the research question along with the instructions. Please follow directions explicitly and list any references used. I thank you.