The best answer I could find is that he thought inspiration came from hard work and discipline. A quote that supports this point would be when he said: "To know what you're going to draw, you have to begin drawing." So, inspirations doesn't just happen by chance.
Answer:
1. = 3
2. = 2 1/2
3. = 2
4. = 6
Explanation:
Quarter = 1 beat + half = 2 beats = 3
Half = 2 beats+ two eights = 1/2 beats = 2 1/2 beats
Quarter = 1 beat + quarter rest = 1 beat = 2 beats
Whole = 4 beats + half = 2 beats = 6 beats
Hope this helps