Set the random seed to 12 for this assignment.
Use multi-indexing to create the following series:
a) Create a Pandas DataFrame named assignment_series with a MultiIndex consisting of two levels: "Group" and "Observation.
b) The "Group" level should have two categories: "A" and "B.
c) The "Observation" level should have 4 observations for each group (total 8 observations).
d) Populate the DataFrame with random values generated from a normal distribution with mean 50 and standard deviation 10.