SAS 还是入门级，教授留作业要求如下，实在写不出来，求助大家：万分感激！！！

From the CRSP database obtain (twice (1=csv, 2=sas7bdat)) the daily values of “Holding Period Return” (MRET) and “Value Weighted Return (inc. distributions)” (VWRET) for ten stock insurers over a three year period; also get the company name. This should result in a data set with the following variables for each observation: PERMNO, firm, day, MRET, and VWRET. There should be approximately 7,500 observations [ten firms times about 250 trading days in each year (give or take a few days because of the fall of weekends, holidays, et cetera)].
Save the file once in a comma delimited (i.e., “comma separated value” or .csv) format and once in a SAS format (use the .sas7bdat option).
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the From the Fama-French database obtain SMB (small market-to-book) and HML (high market-to-book) for the same period.
Save the file once in a comma delimited (i.e., “comma separated value” or .csv) format and once in a SAS format.

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Usung the data above, write a SAS program to estimate (1) each firm’s OLS beta and (2) each firm’s Fama-French beta value.
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