4. For each of the following assertions, say whether it is true or false and support your answer with examples or counterexamples where appropriate. a. An agent that senses only partial information about the state cannot be perfectly rational. b. There exist task environments exist where no pure reflex agent can behave rationally. c. There exists a task environment in which every agent is rational. d. The input to an agent program is the same as the input to the agent function agent function is implementable by some program/machine combination. e. Every agent function is implementable by some program/machine combination. f. Suppose an agent selects its action uniformly at random from the set of possible actions. There exists a deterministic task environment in which this agent is rational. g. It is possible for a given agent to be perfectly rational in two distinct task environments. h. Every agent is rational in an unobservable environment. i. A perfectly rational poker-playing agent never loses. j. For a simple reflex agent in a partially observable environment, a randomized policy can outperform any deterministic policy. k. There is a model-based reflex agent that can remember all of its percepts.

l. Suppose agent A1 is rational, and agent A2 is irrational. There exists a task environment where A2's actual score will be greater than A1's actual score.