Definition: In this task, you need to reverse all words of a given length in the sentence. The number of letters in a word determine its length. For example, the length of the word "apple" is 5.
Input: Sentence: 'someone has been foraging through their backyard and ready to chop up the findings'. Reverse all words of length '3' in the given sentence.

someone sah been foraging through their backyard dna ready to chop up eht findings