A television campaign is conducted during the football season to promote a well-known brand X shaving cream. For each of several weeks, a survey is made, and it is found that each week, 70% of those using brand X continue to use it and 30% switch to another brand. It is also found that of those not using brand X, 30% switch to brand X while the other 70% continue using another brand. (A) Draw a transition diagram. (B) Write the transition matrix. (C) If 20% of the people are using brand X at the start of the advertising campaign, what percentage will be using it 1 week later? 2 weeks later? (A) Draw the transition diagram. Let A be the state in which people use brand X. A' (Type integers or decimals. Do not include the % symbol in your answer.) its