If the two investments above were perfectly positively correlated (rij = +1), what would be the portfolio

Question:

If the two investments above were perfectly positively correlated (rij = +1), what would be the standard deviation? Portfolio
A portfolio is a grouping of financial assets such as stocks, bonds, commodities, currencies and cash equivalents, as well as their fund counterparts, including mutual, exchange-traded and closed funds. A portfolio can also consist of non-publicly...