Which of the followings about class diagrams are correct $($choose all that apply$)?$

If Secretary is a specialized class of Employee superclass, then, according to the the principle of substitutability, we could logically use secretary anywhere we use the employee

Decomposition represents the a$-$kind$-$of relationship

If Secretary is a specialized class of Employee superclass, then, according to the the principle of substitutability, we could logically use employee anywhere we use the secretary

Generalization represents the has$-$parts semantic relationship