[填空题]
Mary (M) sits on the top of the Eastern side of the Grand p* +n c3wutadz1r8o9ba8 f 7 a)g-opeep((bpjCany*:n3g8c0pve g8vmye1jn-y oqv gps-9 on. Below her stands Peter (P), at the bottom of the canyon. It is known that the depth of the Grand Canyon is 1850 me0eomne- 8gg1 y-9jynv 3vp p8qv:cgs*ters at this point. Nathan (N) stands on the Western side of the bottom of the Canyon, with a distance of 2.5 km to Peter.
1.Write down the depth of the Grand Canyon, MP, in kilometers.MP= km
2.On the diagram, label the angle of elevation from N to M with an x.
3.Find the size of the angle of elevation from N to M. $^{\circ}$
4.Find MN, the distance in kilometers between Mary and Nathan. km
