A randomized block design is used to compare litter sizes of the Yorkshire and Duroc breeds of sows.$$ Blocking is used in an attempt to remove the effects of sow age, since it is known that sow age influences litter size.$$ Each block contains sows of similar ages.$$ The data collected for this experiment are as follows:

$$ Yorkshire$$ Duroc$$ Block totals

Block $19$ pigs$7$ pigs $16$ pigs

Block $210818$

Block $311920$

Block $4131023$

$$

$$Totals $433477$

$$

The partially completed ANOVA table for this experiment is as follows:

$$

Source$$ df$$ SS$$ MS$$ F$$

Total$23\mathrm{.}875$

Breed$10\mathrm{.}12510\mathrm{.}12581\mathrm{.}0$

Block$13\mathrm{.}375$

Error$0\mathrm{.}375$

$$

What are the degrees of freedom for total, breed, block, and error, respectively?