Perth Industries is conducting an evaluation of two of its future products, currently known within the company as Project H and Project J. The following table presents the yield and probability data obtained at the moment.

Project H

Performance %	Probability
40	0.10
20	0.20
10	0.40
0	0.20
-20	0.10

Project J

Performance %	Probability
5	0.35
40	0.05
10	0.20
3	0.40

What is the expected value of performance of Project H and Project J Perth Industries?

What is the standard deviation of the performance of project H and project J Perth Industries?

Which project would you recommend to Perth industries for investment and why?

Note : Please answer in a very well explain way with calculations and explanation for better understanding and LIKE