Broody hen with duck and chicken eggs?

Ok here the situation, I live in Tucson where the temp is hitting over 100+ daily, I got a broody hen with 5 chicken eggs and 4 duck eggs. Sense the chick are going to hatch in 21 days and the duck aren't due for 35 days, what happens when the chick hatch and the duck are still developing. Will the hen keep sitting on them or should I move them to a incubator? ( what temp and humidity does the incubator need if I move them?)