11. (3 points) In a rectangle, draw an arbitrary straight line, the rectangle is divided into two parts (as shown in the figure). If three non-coincident straight lines are drawn, then the rectangle is at least divided into $\qquad$ parts, and at most divided into $\qquad$ parts.
【Analysis】When three lines do not overlap and do not intersect, they divide the rectangle into the fewest parts; when three lines do not overlap but intersect pairwise within the rectangle, with 3 intersection points, they divide the rectangle into the most parts, as shown in the figure below, thus the solution is obtained.

【Solution】From the analysis, we can conclude: the answers are: 4, 7.