I don't understand how I should approach this problem from part(1). Please help 1,2 !

Throwing 10 darts at a Cartesian Plane , With X and Y coordinates of the dart following a standard Normal distribution , N10, 1), And X LY. 1 Find Probability that each doot is between 3 and 5 units away from 10, 0 ) (2 ) D.. Dz, .. Dio is the distance each dart is away from the Origin 10, 0). Find the density of DIKT ( Dik) is Kth order stat)