Hi, I've got this question. Please explain how I can solve it step by step and clearly.

(2) The output of the following Python code is: email = "firstName.lastName@kfupm.edu.sa" at =[] dot=[] for m in range(len(email)): if email [m] == '. ' : dot.append (m) if email [m] == ' C ' : at. append (m) print (email[dot [0]+1 : at[0]]) \begin{tabular}{|l|l|} \hline a) & lastName \\ \hline b) & firstName \\ \hline c) & This code generates error. \\ \hline d) & lastName \\ \hline e) & \\ \hline \end{tabular}