please help me in doing this question..please show calculations too to understand

A company that manufactures large LCD screens knows that not all pixels on their screen light, even if they spend great care when making them. In a sheet 8 m by 12 m that will be cut into smaller screens, they find an average of 4.1 blank pixels. They believe that the occurrences of blank pixels are independent. Their warranty policy states that they will replace any screen sold that shows more than 2 blank pixels. Complete parts (a) through (d) below. a) What is the mean number of blank pixels per square metre? The mean is pixel(s). (Round to three decimal places as needed.) b) What is the standard deviation of blank pixels per square metre? The standard deviation is pixel(s). (Round to three decimal places as needed.) c) What is the probability that a 2 m by 3 m screen will have at least one defect? A 2 m by 3 m screen will have at least one defect with probability (Round to three decimal places as needed.) d) What is the probability that a 2 m by 3 m screen will be replaced because it has too many defects? A 2 m by 3 m screen will need to be replaced with probability (Round to three decimal places as needed.)