What is the standard deviation of a portfolio that is invested 40% in stock Q and 60% in stock R? 
Definitions:
Pituitary Gland
A small, pea-sized gland located at the base of the brain, crucial for regulating vital body functions and general wellbeing through the secretion of hormones.
Master Gland
A term often used to describe the pituitary gland due to its critical role in regulating various functions in the body by releasing hormones.
Endocrine System
The endocrine system is a network of glands in the body that produce, store, and secrete hormones, which regulate the body's growth, metabolism, and sexual development and function.
Pulsatile Pattern
Refers to rhythmic variations or fluctuations that occur at regular intervals, often seen in biological processes such as hormone secretion or heartbeats.
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