Can you help me specifically with Part B - especially #3 & #4?

Part A Directions: Using 100 pennies, complete the following activities:
1. Spread 100 pennies across a table
2. Separate into two groups based on heads and tails
3. Total the number of heads and number of tails
4. Compute the percentage of heads and the percentage of tails
5. Create a bar chart to show results

Part B Directions: Using 100 pennies, complete the following activities:
1. Group pennies by year
2. Regroup pennies into various classes by decades
3. Create a relative frequency distribution by decades (see Excerpt 7.1 from Research in Education: Evidence-Based Inquiry for a model; focus on the percent column) page 150 (3 of 29)
4. Create a cumulative frequency distribution by decades (see Excerpt 7.1 from Research in Education: Evidence-Based Inquiry for a model; focus on the percent summation column)
5. What is the relative frequency of the 3rd class?
6. What is the cumulative frequency of the 5th class?
7. Create a histogram based on the cumulative frequency distribution (see Excerpt 7.4 from Research in Education: Evidence-Based Inquiry for a model)
8. What percent of the coins are 1970 or older?

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