No affirmative defenses being pled, no counteraffidavits being filed, and the requests for admission, D.C.C.R. 36, being unanswered and therefore admitted as true, plaintiff met its burden of proof, Gore v. Green Mountain Lakes, Inc., 140 Vt. 262, 264, 438 A.2d 373, 374 (1981), and no material issue of fact shown, D.C.C.R. 56(e), summary judgment for plaintiff affirmed. Alpstetten Association, Inc. v. Kelly, 137 Vt. 508, 514, 408 A.2d 644, 647-48 (1979).