Estimation and confidence interval . please help.

MODULE 2 MAJOR OUTPUT(Simulation Case) Background: You are given the dataset representing the monthly salaries from a sample of thirty (30) Data Scientists. You wish to find the actual average salary that a data scientist would earn. However it would be impractical to gather all the data scientist in the world to get their salary information. Hence, you settle with analyzing the sample. The population standard deviation is known to be P 15,000. Task 1: Calculate the mean and the standard error. Task 2: Find the appropriate Z-score for calculating a 90% confidence interval Task 3: Find the Confidence Interval with a confidence level of 90% P 117,313 P 113,136 P 91,986 P 112,276 P 109,714 P 89,344 P 104,002 P 80,740 P 94,868 P 108,637 P 108,833 P 114,426 P 113,038 P 100,536 P 90,745 96,818 P 115,295 P 90,410 P 101,936 P 105,057 P 5102,848 P 97,307 P 89,279 P 95, 118 P 84,560 P 87,201 P 85,927 P 114,564 P 81,720 P 113,382