2-47 Rose is a project manager at the civil enginee ing consulting firm of Sands, Gravel, Concrete, and Waters, Inc. She has been collecting data on a projec in which concrete pillars were being constricted however not all the data are available. She has bees able to find out that the 10th pillar required 269 person-hours to construct, and that a 75% learning curve applied. She is interested in calculating the time required to construct the 1st and 20th pillan Compute the values for her.