In order to calculate this, you just have to calculate the PE of every cilynder, and as you know the PE is calculated with the next formula:
SO we just hve to insert the values into the formula to get our results, remember that the height will change with every sample because we are putting the cylinder at different heights:
100m:
200m:
1000m:
And you have the different heat generated by each cilynder at different heights.
All the mentioned option will yield the same DNA for the suspect but blood, besides the DNA also contain further information that can be matched to the victim like blood group, genotype, some antibodies present and even traces of substances and disease.