Refer to Exercise 3.41 for the definition of a stochastically increasing family. (a) Show that a location

Question:

Refer to Exercise 3.41 for the definition of a stochastically increasing family.
(a) Show that a location family is stochastically increasing in its location parameter.
(b) Show that a scale family is stochastically increasing in its scale parameter if the sample space is [0, ∞).