there are n individuals, and ei is the effort contributed by individual i whose utility function

is

Ui = (e1 + e2 + + en1 + en) ei

Individual i can set ei equal to any number between 0 and 1 inclusive. Provide an example of

values of parameters and such that:

a. ei = 0 is the unique equilibrium.

b. ei = 1 is the unique equilibrium.

c. There are at least two different equilibria