Need help with 95% confidence interval. Have 5 that need to be figured out. The five with the Mean listed first and the standard deviation next are as follows: Mean: 20,330.5; SD: 53,510.2 Mean: 5.417; SD: 4.336 Mean: 2.000 SD: 3.684 Mean: 1.637 SD: 0.971 Mean: 4.557 SD: 4.028. Break it down step by step.