$6\mathrm{.}20$ LAB: JavaScript maps

Download the ZIP file below containing HTML and JavaScript files. Write the function calcWordFrequencies$()$ in script.js that uses the JavaScript prompt$()$ function to read a list of words $($separated by spaces$).$ The function should output those words and their frequencies to the console.

Ex: If the prompt input is:

hey hi Mark hi mark

the console output is:

hey $1$

hi $2$

Mark $1$

mark $1$