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.

Sentence: 'he is a serious baseball player and is ready for the pitch'. Reverse all words of length '5' in the given sentence.
he is a serious baseball player and is ydaer for the hctip

Sentence: 'a guy is jumping off a skateboard in the air'. Reverse all words of length '1' in the given sentence.
a guy is jumping off a skateboard in the air

Sentence: 'a couple of people riding skis down a snow covered slope'. Reverse all words of length '7' in the given sentence.

a couple of people riding skis down a snow derevoc slope