Eric Thompson is the new flat-panel TV division manager for LG Electronics.He wants to make a $50 cash rebate program to promote the new OLED micron-technology televisions.Eric conducts a survey and at the end of 1 week, he has 300 respondents and an overall variability of 28% for the key factor ("How many people would buy a flat-panel television with a $50 rebate"). Using the appropriate formulas:

(a) calculate the +/- Margin of Sample Error for a 99% confidence level

(b) what is the 99% confidence interval for the responses? (provide lower and upper limits)