<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def plot_s_bc(fignum, Bc, S, sym):
 """ function to plot Squareness,Coercivity Parameters __________ fignum : matplotlib figure number Bc : list or array coercivity values S : list or array of ratio of saturation remanence to saturation sym : matplotlib symbol (e.g., 'g^' for green triangles) """

    plt.figure(num=fignum)
    plt.plot(Bc, S, sym)
    plt.xlabel('Bc')
    plt.ylabel('Mr/Ms')
    plt.title('Squareness-Coercivity Plot')
    bounds = plt.axis()
    plt.axis([0, bounds[1], 0, 1])