Figure shows the design of a Texas arcade game. Four laser pistols are pointed toward the center

Question:

Figure shows the design of a Texas arcade game. Four laser pistols are pointed toward the center of an array of plastic layers where a clay armadillo is the target. The indexes of refraction of the layers are n1 = 1.55, n2 = 1.70, n3 = 1.45, n4 = 1.60, n5 = 1.45, n6 = 1.61, n7 = 1.59, n8 = 1.70, and n9 = 1.60. The layer thicknesses are either 2.00mrn or 4.00mm, as drawn. What is the travel time through the layers for the laser burst from?(a) Pistol 1,(b) Pistol 2,(c) Pistol 3, and(d) Pistol 4?(e) If the pistols are fired simultaneously, which laser burst hits the targetfirst?