This question has 2 parts. To connect customers to the bre broadband network an engineer must connect the property to the network. This task is called an installation. A manager has conducted 10 installations using new equipment to evaluate the average time an installation takes with this equipment. The duration of an installation is known to follow a Normal distribution with population standard deviation of 4 minutes. i) If a 99% condence interval for the mean installation time is to be computed, what is the margin of error\"? 0 1.56 O 1.86 O 3.10 3.31 O 3.26 ii) The manager would like to take another sample and determine a 99% condence interval with a margin of error of 2 minutes. What sample size would be needed to achieve this goal