Hi I need help on what is the answer to this problems? Below is the question and other concerns will be in the comment section. I hope you can help me and surely I will give you full positive feedback.

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Consider a population of eight students whose ages, in years. Let X denote the age of a randomly selected student. Ages: 19 20 2O 19 21 27 19 21 1. Supply the missing information to construct the probability distribution of X. Express your answers in three decimal places. 19 20 21 27 2. Calculate the expected value of X. Express to 3 decimal places. 3. Calculate the standard deviation of X. Express to 3 decimal places. The random variable has the following probability distribution. X 1 2 3 4 P00 0.3 0.1 0.1 0.2 1. Calculate the mean of X. Express your answer to 3 decimal places. 2. Calculate the standard deviation of X. Express your answer to 3 decimal places. 0.3