Exercise $7$

a$.$ A schwa is inserted between two consonants in a consonant cluster.

a$.$ Type of rule:

b$.$ Rule

b$.$ In consonant clusters, the second consonant deletes.

a$.$ Type of rule:

b$.$ Rule:

c$./$s$/$ becomes $z$ at the end of the word when followed by a voiced consonant in the next word. Notice that if the UR is only one sound, we can write $\frac{?}{?}\frac{s}{?},$ because we are not trying to capture natural classes with more than one sound.