Question 5 Exhibit 2-1 2 points Save Answer The numbers of hours worked (per week) by 400 statistics students are shown below. Number of hours Frequency 0 - 9 10 - 19 20 80 20 - 29 30 - 39 200 100 Refer to Exhibit 2-1. The cumulative relative frequency for the class of 20 - 29 O a. is 0.5 O b. is 0.75 O c. is 300 O d. is 0.25Question 24 4 points Save Answer The returns for a pharmaceutical firm are: -5% in Year 1, 4% in Year 2, -7% in Year 3, 5% in Year 4, and 8% in Year 5. Fill in the Blank: Use Excel to answer the following question. In your answer, show one (1) digit to the right of the decimal point, for example, 1.0, 1.2. Apply the appropriate rounding rule if necessary. Use the "Format Cell..." option in Excel to show the required number of decimal places (Excel will automatically round the number up or down). Do not show any symbols (%) or words in your answer. What is the average annual rate of return (in %) for the period