(a) Probation. After conviction of an offense the defendant may be placed on probation as provided by law.

(b) Revocation of Probation. The court shall not revoke probation except after a hearing in which the defendant shall be present and apprised of the grounds on which such action is proposed. The defendant is entitled to be represented by counsel and may be released pursuant to CrR 3.2 pending such hearing. Counsel shall be appointed for a defendant financially unable to obtain counsel.