As shown in the figure, in the parallelogram ABCD, point m is on the extension line of Da, point n is on the extension line of DC, and Mn ‖ AC and Mn intersect AB and BC at points P and Q respectively ① Try to explore the size relationship between MQ and NP ② If Mn intersects the extension lines of AB and CB at points P and Q respectively, does the size relationship between MQ and NP still hold? Illustration:

From the proportion, MP: Mn = Ma: MD = NC: nd = NQ: Mn
So MP = NQ, easy to get MQ = NP
The second question is the same as above

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