Please help me to answer this questions task J and J#1

Q3 Wk10 Day 1 - Performance Task J (Confidence interval Performance Task J: Solve the given problem below. Note: Answers like values are to be expressed in four decimal places. Problem: Suppose that the heights of 100 ABM male students at ICNHS represent a random sample of the heights of all students at the said school. If the mean height of the sample is 67.45 inches and the variance is 8.61. find the 95% and 99% confidence intervals for the mean height of all male students at ICNHS. Which of the two confidence intervals is wider? (Hint: To answer performance task ] simply follow the solutions of the examples given.) Q3 Wk10 Day 2 - Evaluation J #1 (Proportion) Evaluation ]: Solve the following problems. Note: Answers like values are to be expressed in four decimal places. 1. In a random sample of 1000 homes in a certain town, it is found that 282 are heated by firewood. Find the 95%% confidence interval for the proportion of homes in this city that are heated by firewood