The measure of MJK is 16°
From the diagram :
MKN = 180 - (61 + 59) (sum of angles in a triangle)
MKN = 60°
LKJ = 180 - (104 + 60) (Sum of angles on a straight line)
LKJ = 16°
MKN = KMJ (Alternate angles)
KMJ = 60°
MJK = 180 - (104 + 60) (sum of angles in a triangle)
MJK = 16°
Hence, MJK is 16°