Mathematics · Permutations and Combinations

There are four letters and four addressed envelopes. Exactly one specific letter is meant for exactly one specific envelope. If the letters are randomly inserted into the envelopes, consider the following statements: 1. It is possible that exactly one letter goes into an incorrect envelope. 2. There are only six ways in which exactly two letters can go into their correct envelopes. Which of the statements given above is/are correct?