Reverse each word and the whole string

Write a function reverseBoth(sentence) that reverses a string in two ways and returns both results in an object { eachWord, whole }.

• eachWord: the characters of every word are reversed, but the words stay in their order. 'Hello World' gives 'olleH dlroW'.
• whole: the whole string reversed character by character. 'Hello World' gives 'dlroW olleH'.
• Words are separated by spaces. A word is any group of characters between spaces, so punctuation is part of the word: 'Hi!' gives '!iH'.
• In eachWord every space stays where it is: double spaces, spaces at the start and spaces at the end too. The input has only spaces as whitespace, no tabs or line breaks.
• For the empty string both fields are ''.

You can split the string into words and join them back, but keep every space.