Write the answers to the following questions. 1- Create a 4x4 matrix with values from 1 to 16. 2- Create a DataFrame that generates 4x3 random numbers. You can give the column and index names as you wish. 3- Arr np.array([[50, 12,np. nan.16), /np.nan, np.nan,80, 70), /93,np.nan,16,np.nan]]) Convert the array of values to DataFrame. Try what can be done about missing values. (You can take the average value and write it to the missing values).