4. In the accompanying figure, N is a point on PQ and M is a point on PR of APQR such that NM QR. T is a point on QR such that NT PR. QT:TR = 3:2 PQ = 30 units and PM = 16 units 7 N M Calculate, stating reasons, the lengths of: 4.1 PN 4.2 MR R T (5) (5)