Please I need solution for this issue with all the details .please you can write the answer typing and not write by hand,so that I can read and understand your answer clearly.I need step by step solution to the following this question asap.

a) What is the real interest rate if the nominal interest rate is 5 percent and inflation is 2 percent. Answer exactly. b) Calculate the expected return and standard deviation of a random variable with three states given by the table: Return Probability 3% 50% 4% 30% 5% 20%