# 	**Problem 12.1**
# A seismic line was run with the given first-arrival-time results
slope_segment_A = 0.2 ms/ft
slope_segment_B = 0.0562 ms/ft
Ti = 21.64 ms

# Part A: Find v1
v1 = 1/slope_segment_A; ft/s

# Part B: Find v2
v2 = 1/slope_segment_B; ft/s

# Part C: Find ic
ic = asin(v1/v2); degrees   # Eq. 12-6

# Part D: Find Z
Z = (Ti/2)*v1*v2/sqrt(v2^2 - v1^2); ft   # Eq. 12-7