Can someone explain 7-12 or at least at some of them?

The step function g(x) is defined as shown.what is the range of g(x)? ***answer choices in picture.

1. if we have 3 babies what is the probability they’re going to be all boys? 2. if we roll 2 die at the same time what is the probability of getting less than 10 on the first roll and a 5 on the second roll 3. if we have 3 babies what is the probability their is going to be 2 girls? 4. if we have 3 babies what is the probability of having no more than 1 girl? 5. it we have 3 babies and then have another 3 babies what is the probability of us having at least 1 boy and then having all girls?

Solve 13 + w/7= -18 (w/7 is a fraction)