To predict how fast Alfred will be able to type after four weeks of practice, let's identify the pattern of his progress. We can see his typing speed increasing week by week:
- Initial speed: 27 words per minute
- After 1 week: 29 words per minute
- After 2 weeks: 31 words per minute
Each week, Alfred's typing speed increases by 2 words per minute. Thus, we can continue the pattern to find his speed after additional weeks:
- After 3 weeks: 31 + 2 = 33 words per minute
- After 4 weeks: 33 + 2 = 35 words per minute
Based on this pattern, Alfred will be able to type 35 words per minute after four weeks of practice.
So the correct answer is:
35 words per minute