Step 1 :The sample space in this case is the set of all possible outcomes. Since we are picking one ball from a bag that contains balls labeled A, B, C, D, and E, the sample space is the set of these letters.
Step 2 :The event of choosing a letter from A to C is a subset of the sample space. It includes the outcomes A, B, and C.
Step 3 :Final Answer: Sample space: \(\boxed{\{A, B, C, D, E\}}\)
Step 4 :Event of choosing a letter from A to C: \(\boxed{\{A, B, C\}}\)