code: def schout2contank(a, b, d):
      th = d * b / np.sqrt(a**2 - b**2)
      k = 1 / (d * np.sqrt(a**2 - b**2))
      s = np.sqrt(d / np.sqrt(a**2 - b**2))
      return th, k, s
  
imports: import numpy
  import matplotlib.pyplot
label_desc: Use image node_id 1 for calling a global function with example usage: schout2contank(a, b, d) and returns: th,  k,  s