To configure an attribute selector for the submit button, you can use the following CSS code:
input[type="submit"] {
grid-column: 2;
width: 9em;
}
This will select any input element with a type attribute of "submit" and apply the specified properties to it. The grid-column property will place the button in the second column of the grid layout. The width property will set the width of the button to 9em.
It's worth noting that this code assumes you have a grid layout in place. If you don't, you'll need to add some additional CSS to define your grid before this code will work.
In summary, the attribute selector for the submit button can be configured using CSS code that selects the input element with a type attribute of "submit", and sets the grid-column property to 2 and the width property to 9em.