In JavaScript, create a function called onlyBooleansAndstrings which is an array of elements and count only the boolean and string elements occurring in the array.

The output is the number of boolean and string occurrences.

Example of the code:

function onlyBooleansAndstrings (MyArray) {

// Insert code here;

}

onlyBooleansAndstrings (["David", true, 65, true, false, 6634, "Hi", false, 10, "abc"]);

Output: 7