R中实证因子分析求助

大熊猫和大脸猫

Please use CLDS2012 individual data for the exercise.
# The data should contain no less than 10 variables.
# (1) Use exploratory factor analysis to construct a single underlying factor
# (2) Use confirmatory factor analysis to assess if the data is consistent
#     with the single underlying factor model
# (3) Can you suggest an alternative model that fits the data better?

这是题目，第一问会，就是实证因子分析不会，急求各位帮忙。