Which is the correct sequence of steps for the PCA Algorithm?

a$.$

Collection, Calculate, Sort, Structure, Covariance, Standardize, Eigen Vectors & Values Sort, Calculate

b$.$

Collection, Calculate, Sort, Structure, Standardize, Covariance, Eigen Vectors & Values Sort, Calculate

c$.$

Collection, Structure, Standardize, Covariance, Eigen Vectors & Values, Sort, Calculate

d$.$

Collection, Sort, Calculate, Structure, Standardize, Covariance, Eigen Vectors & Values Sort, Calculate