let alumnos = ['Carlos','Clara','Cristina','Fernando','Ivan','Lara','Mercedes',
               'Rafael','Roberto','Sandra','Tania','Raulito','Milagros']
 let m1 = alumnos.splice(0,(alumnos.length/2));
 console.log("Mitad 1 --> ",m1);
 let m2 = alumnos.splice(0,alumnos.length);
 console.log("Mitad 2 -->",m2);