box-shadow: Please find the error??

Question

div {
width: 300px;
height: 100px;
background-color: #9ACD32;
box shadow: 10px 10px #888888;
}

Answer 1

box-shadow: 10px 10px #888888;

Answer 2

Thats right

Answer 3

box-shadow with -

Answer 4

thanks all