i coudn't find the answer for this problem let me know if you could find the ans

Complete the table below for Bannister Inc. Round your answers to 2 decimal places. Number of Total Average Marginal workers Product Product Product 3 3 3 2 7 3.5 4 W 12 4.00 5 16 4 4 19 3.8 3 6 21 3.5 2 7 21 3 O b. How many workers are being used when the point of diminishing returns is first apparent? workers c. How many workers are being used when total product is at a maximum? 7 workers d. What is the most productive output? units