The owner of a toy shop conducts a survey of goods sold in the past two weeks. He sorts the toys into three categories—soft toys, educational toys, and physical activity toys with their respective sales per week. A total of 85 toys were sold in the past two weeks and showed an equal total sale of 30 for the soft toys and educational toys. The owner found that 60% of total sales were from the second week. At the same time, the educational toys in the first week and the physical activity toys in the second were sold with the same weightage of 20%.

a. Use the information to construct a joint frequency distribution.

b. Convert your part a distribution to a joint relative frequency distribution and round up your answers to two decimal places.

c. Determine the best-selling toy for each week.

d. What percentage of the total toy sales do the educational toys and physical activity toys sold in second week constitute?