how to calculate average maths score for student of each year level(9,10,11,12) at each school, using pandas. how to make a pandas series for each year, and group each series by school, and then combine the series in a dataframe

the results like below

	Year 9	Year 10	Year 11	Year 12
Bailey High School	72.493827	71.897498	72.374900	72.675097
Cabrera High School	72.321970	72.437768	71.008299	70.604712
Figueroa High School	68.477804	68.331586	68.811001	69.325282
Ford High School	69.021609	69.387006	69.248862	68.617811
Griffin High School	72.789731	71.093596	71.692521	71.469178
Hernandez High School	68.586831	68.867156	69.154412	68.985075
Holden High School	70.543307	75.105263	71.640777	73.409639
Huang High School	69.081754	68.533246	69.431345	68.639316
Johnson High School	69.469286	67.990220	68.637730	69.287393
Pena High School	71.996364	72.396000	72.523438	71.187845
Rodriguez High School	71.940722	71.779808	72.364811	72.154626
Shelton High School	72.932075	72.506696	70.097087	72.331536
Thomas High School	69.234273	70.057007	69.657831	69.369822
Wilson High School	69.212361	69.455446	68.378965	69.787472
Wright High School	71.741176	72.179012	73.275862	70.848238

csv file link https://drive.google.com/drive/folders/1N5tUXjtgSq5G2msJy4tqzZOrNT4VaWcW?usp=sharing