Which type of chart is used to represent the proportion or percentage of different categories as a whole?

1. Bar chart
2. Line chart
3. Pie chart
4. Area chart

Which of the following is a subcategory of AI that enables machines to learn on their own and improve with time through experience?

1. Mathematics
2. Machine learning
3. Deep learning
4. Rule-based approach

Which of the following stages of the AI project cycle focuses on testing the selected AI model, and the results need to be compared with the expected outcome?

1. Evaluation
2. Data exploration
3. Data acquisition
4. Problem scoping

In which approach does the machine follow the rules defined by the developer and produce the required output?

1. Learning-based approach
2. Rule-based approach
3. Both a and b
4. None of these