You are asked to do a learning curve analysis as part of your internship project, but you discover that the data is pretty slim. Unfortunately you don't have time to do more field work and you have to come up with the best estimate based on the available data.

Here's what you know: It took 98.71 minutes to complete the seventh unit and only 89.35 minutes to complete the twelfth unit.

What is your best estimate of the time it took to make the first unit? (select the closest answer)

100

135

141

155