Toyota Corp.'s stock price has a variance of returns of 0.0305. Honda Corp.'s stock has a variance of returns of 0.0475. The covariance between Toyota and Honda is 0.0275. 

What is the correlation coefficient between Toyota and Honda?

Toyota Corp.'s stock price has a variance of returns equal to 0.0315. Honda Corp.'s stock price has a variance of returns equal to 0.0495. The covariance between Toyota and Honda is 0.0525. 

What is the standard deviation of a portfolio consisting of 50% Toyota and 50% Honda?

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