1. Develop a function that: accept a list of real numbers (float) calculate the sample standard deviation of the list of numbers return the standard deviation 2. Develop a program that allows the user to convert between the metric measurements of millimeter, centimeter, meter, kilometers; and inches, feet, yards, and miles. The program should be written so that any one measurement can be converted to the other. 3. Develop a function that accept a list of real numbers (float) and then calculate and return the 95% z-based confidence interval. The function must return a list consisting of two elements only.