Módulo 1 - Ejercicio Opcional 03
| Estilo a H1 | Tupla (A,B,C,D) | 
|---|---|
| h1 { color: green;} | (0,0,0,1) | 
| #caja header h1 {color: red;} | (0,1,0,2) | 
| #caja .cabecera h1 {color: orange;} | (0,1,1,1) | 
| header h1 {color: blue;} | (0,0,0,2) | 
| .cabecera h1 {color: gray;} | (0,0,1,1) | 
| header > h1 {color: skyblue;} | (0,0,0,2) | 
| h1 {color: yellow;} | (0,0,0,1) |