Your answer would be 40°. This is because you can use the rule that angles in a triangle add to 180°, and so add 98 and 42 to get 140, and then subtract that from 180 to get 40° as angle HAC. Then, we can use the rule that alternate angles are equal, as this is a parallelogram so lines AC and SE are parallel, which means that angle HES is also 40°.
I hope this helps!
