Define each of the following terms:
a. Synergy; merger
b. Horizontal merger; vertical merger; congeneric merger; conglomerate merger
c. Friendly merger; hostile merger; defensive merger; tender offer; target company; breakup value; acquiring company
d. Operating merger; financial merger
e. Adjusted present value (APV) model
f. Purchase accounting
g. White knight; poison pill; golden parachute; proxy fight
h. Joint venture; corporate alliance
i. Divestiture; spin-off; leveraged buyout (LBO)
j. Holding company; operating company; parent company
k. Arbitrage; risk arbitrage