JEE Advanced 2024 Chemistry question on Biomolecules

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

$\textbf{5'}$ A G T C A C G T A A G T C $\textbf{3'}$

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 = 1.0 kcal mol$^{-1}$, G-C base pair = 1.5 kcal mol$^{-1}$, and A-U base pair = 1.25 kcal mol$^{-1}$. Ignore electrostatic repulsion between the phosphate groups.]