2F. The Spearman's correlation coefficient can also be obtained directly from the cor.test() function, by using the parameter method="spearman". Instructions Use the cor.test() function on the original sewer signal data (not the ranks) but use the parameter method="spearman" to look at whether this matches what we just did. Store the rho value from the test into the variable rho_cor_test. Hint: the rho value can be extracted directly using something like cor.test()$estimate