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: 'two people are holding rackets upright on a tennis court'. Reverse all words of length '7' in the given sentence.
two people are gnidloh stekcar thgirpu on a tennis court

Sentence: 'a woman checks upon a baby in a bed'. Reverse all words of length '1' in the given sentence.
a woman checks upon a baby in a bed

Sentence: 'a man on a skateboard on top of concrete'. Reverse all words of length '1' in the given sentence.

a man on a skateboard on top of concrete