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Please refer to the previous question to answer this question. What is the correct the standard deviation of the portfolio (sdp)?

- Define a function with the name "standard_deviation ", which will take two arguments, investment proportion and given standard deviation in last question.
The signature of the function should be like:

**def standarddeviation(investment_proportions, sd_1):**Use the formula,

Sd(p) = (sd_1*wi) where, sd_1 = given standard deviation wi = investment proportion/100

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