Выберите нужную форму прилагательного или наречия. I am busier / more busy than our engineer.Please, speak louder / more

I am busier than our engineer. Please, speak louder. I can’t hear you well. Their computers are the most expensive on the market. They would like to expand e-business later. You should study our terms more attentively. Our office is farther than yours. This is the worst retailer I have ever seen! Remember, we have less time than we had before. You have to look through the draft contract closely. His accounting skills were not so perfect as I expected.