Creating Javascript objects two

// Write a function that takes two strings (a and b) as arguments
// Create an object that has a property with key 'a' and a value of 'b'
// Return the object
function
myFunction
(
a, b
)
{

return
}
Test Cases:
myFunction('a','b')
Expected
{a:'b'}
myFunction('z','x')
Expected
{z:'x'}
myFunction('b','w')
Expected
{b:'w'}