/* Grouping Selectors */
.firstbutton, .secondbutton {
  font-family: "Helvetica", "Times New Roman", sans-serif;
  font-size: 28px;
}

/* First Button */
.firstbutton {
  background-color: black;
  color: white;
}

/* Second Button */
.secondbutton {
  background-color: yellow;
}