Riddle of the week! - Fruit

In a contest, an apple, a banana, an orange, and a pear have been placed in four boxes (one fruit in each box). People may guess which fruit is in which box. 123 people participate in the contest. When the boxes are opened, 43 people have guessed none of the fruits correctly, 39 people have guessed one fruit correctly, and 31 people have guessed two fruits correctly.

How many people have guessed three fruits correctly, and how many people have guessed four fruits correctly?