Google is thinking about building a new search engine. The current price of Google is $100 and the price of Google in one year depends on the success of the software. The figure below shows the probability and the corresponding prices of Google one year from now. Please calculate the expected return, variance, and standard deviation of return.

Py = $140 t+1 50% 10% P#+= $110 P1 = $100 40% P. = $60 t+1