Write a function called my$\_$scale$()$ that inputs a numeric vector x and outputs a vector such that:

$$ The output vector contains the min$-$max scaled values of the input vector.

$$ The output object contains additional attributes called a and b that contain, respectively, the original

minimum and maximum of the input vector.

$$ If the input vector does not contain both attributes a and b$,$ the output vector should be scaled to the

range from $0$ to $1.$ If the input vector contains both attributes a and b$,$ the output vector should be

scaled to the range from a to b