Biomolecules

For a double strand DNA, one strand is given below:

The amount of energy required to split the double strand DNA into two single strands is ______ kcal mol−1 .
[Given: Average energy per H -bond for A-T base pair =1.0‌kcal‌mol−1,G−C base pair =1.5‌kcal‌mol−1 , and A−U base pair =1.25‌kcal‌mol−1 . Ignore electrostatic repulsion between the phosphate groups.]