/* ------------------------------------------------------- Exercise: call the "speak" function. Note: you will need to write the "greeting" function. The "speak" function takes an unspecified "greeting" function as a parameter. When called, the speak function passes the arguments "firstName" and "lastName" to the unspecified function. ------------------------------------------------------- */ function speak(greeting, firstName, lastName){ greeting(firstName, lastName); } // call the speak function // ---- Your Code ----