I didn't get the right answer for the highest range

ExpL = =D10+(AE28-C10)/(C11-C10)*(D11-D10) = .247

ExplH = =D13+(AE28-C13)/(C14-C13)*(D14-D13) = .4067

ExpFactor = ExpH - ExpL = 16%. Howver the solution shows 33% for this range.

Also on the exam - do you think we need to explain the method? Will all of those formulas be available in the pearson environment?

For the last example for inuring reinsurance "Calculate the Loss Cost with Inuring Reinsurance", the solution calculates the insured value after surplus share as min( surplus share retention, Midpoint). I do not quite understand this, shouldn't the insured value net of surplus share be max(0, midpoint - surplus share retention), then only we apply the excess of loss treaty?

Based on my understanding, the surplus share treaty is bought by the insurer, not the insured, so why would the insured retain the first $200K of each loss (commentary)? Shouldn't the insurer retain the first $200k of each loss and the insured value to calculate exposure factor for reinsurer loss is NET of the portion covered by surplus share?

Please correct me if my understanding is flawed.

Thanks!