how we can calculate the lattice energy of NaCl and MgF by using born haber cycle

Answer 1

Magnesium fluoride is MgF2.
Here are several links for the Born-Haber cycle. That cycle uses Hess' law to calculate lattice energy.
https://www.google.com/search?client=firefox-b-1-d&q=calculate+lattice+energy+with+born+haber+cycle