Question 4 6 Points The following table shows the rate of return on stock for 2 companies "Tania's Services & Warda's Events". Probability Rate of return on stock Tania's Services Product Warda's Events 0.3 70% 25% Product 0.2 45% 15% 0.5 -10% 10% Expected Rate of Return Expected Rate of Return a. Calculate the expected rate of return for Tania's Services. b. Calculate the expected rate of return for Warda's Events. c. Write the Variability Formula d. Calculate the variability of Tania's Services e. Calculate the variability of Warda's Events f. Which of these 2 companies is the most risky