Identify each of the following business combinations as being vertical-backward, vertical-forward, horizontal, product extension, market extension, or conglomerate:
a. An inboard marine engine manufacturer is acquired by an outboard engine manufacturer.
b. A cosmetics manufacturer acquires a drug store chain.
c. A financial holding company acquires a mail order movie rental company.
d. A computer manufacturer acquires a chip manufacturer.
e. The Walt Disney Company acquires a broadcasting company.
f. A California-based electric utility acquires a Colorado electric utility company.