Briefly explain which of the five competitive forces is involved in each of these business developments.
a. The effect on Samsung, maker of the Galaxy large screen smartphone, as Apple introduces the iPhone 6 with a larger screen.
b. The effect on McDonald's as White Castle and Taco Bell consider starting to sell breakfast food.
c. The effect on cable television firms as Apple plans a Web TV service that will include programs from 25 to 30 cable networks.
d. The effect on the publishing firm Hachette when Amazon bargains to lower the prices of the books Hachette sells on Amazon's site.
e. The effect on the Carmike movie theater chain of IMAX increasing the fees it charges to theaters to use its technology.