The time it takes to make personalized chocolate bars is given in the table. Chocolate Bars Time (in hours) 20 6.25 50 14.0 100 24.25 250 50.0 500 103.0 (a) What variables are appropriate? O c (number of chocolate bars) and 7 (time taken (in hours) to make personalized chocolate bars) O C (cost (in dollars) to make personalized chocolate bars) and P (number of people required to make personalized chocolate bars) O T (time taken (in hours) to make personalized chocolate bars) and C (cost (in dollars) to make personalized chocolate bars) O c (number of chocolate bars) and C (cost (in dollars) to make personalized chocolate bars) O c (number of chocolate bars) and P (number of people required to make personalized chocolate bars) (b) Find an equation for the time it takes to produce personalized chocolate bars. (Use the first and last values in the table to calculate the slope, then use the first value to calculate the y-intercept. Round the slope to three decimal places and the y-intercept to two decimal places.) T(c)