PART A:
Maya is using 3/4 of the original amount of oats, so she will need:
(3/4) * 12 cups = 9 cups
She wants to double her new recipe, so the final amount of oats she will need is:
2 * 9 cups = 18 cups
Therefore, Maya will need 18 cups of oats.
PART B:
Maya is increasing the amount of blueberries by 1/4 of the original amount, which is:
(1/4) * 34 cups = 8.5 cups
So the new amount of blueberries she will use is:
34 cups + 8.5 cups = 42.5 cups
To double the recipe, Maya will need:
2 * 42.5 cups = 85 cups
Writing the answer as a mixed number:
85 cups = 2 * 34 cups + 17 cups
Therefore, Maya will need 2 and 17/34 cups of blueberries.