I have some difficulty solving for the problem thank you in advance

Points] DETAILS PREVIOUS ANSWERS BBBASICSTAT8 6.R.009. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER nsumer Banker Association released a report showing the lengths of automobile leases for new automobiles. The results are as follows. Lease Length in Months Percent of Leases 13-24 14.8% 25-36 37.3% 37-48 30.7% 49-60 16.9% More than 60 0.3% (a) Use the midpoint of each class, and call the midpoint of the last class 66.5 months, for purposes of computing the expected lease term. Also find the standard deviation of the distribution. (Round your answers to two decimal places.) expelated lease term 36.57 months standard deviation 17.97 X (b) Sketch a graph of the probability distribution for the duration of new auto leases. 35 30 30 25 i of Leases 20 1 of Leases 20 15 15 10 18.5 30 5 425 545 645 18.5 30.5 425 545 685 ase Length in Months so Longth in Months