WRED (Weighted Random Early Detection)

Hi,

Is the MPD the number of packets that will be dropped (1 in 4 in the lesson for 25%) before we reach the maximum threshold then everything is dropped?
So 25% MPD means 1 out of 4 packets will be dropped to start with when the minimum threshold has been breached and does it continue like that until the max threshold has been reached then all packets are dropped? So the higher the number of packets the average queue depth rises but the drop rate is still 1 in 4 until the max threshold has been reached then everything dropped?

And also…Is the number of packets configured in the thresholds the amount of packets in the queue when there is congestion in the queue?

Thanks again