Please solve the problem. Show your complete solution and the formula that you use. Thank you so much! (Identify all what is needed in the problem)

Instruction: Solve the following problems. Show your complete solution. 1. You and your 4 other friends play 5 ranked games in Mobile legends everyday for the past few months. As you play with them, you recorded the number of wins you have per day. The table below shows the number of wins you have per day and their corresponding probabilities. 2 4 5 P(X = x) 0.262 0.393 0.246 0.082 0.015 0.002 a) If you are planning to play 5 ranked games with them today, how many wins will you expect? b) Compute the variance and the standard deviation of the ran- dom variable