Compute the portfolio DEAR for the following bank portfolio

Assets DEAR $($$$)$ Correlations

Stocks Bonds Loans Commodities

Stocks $$100,0001-0\mathrm{.}250\mathrm{.}15-0\mathrm{.}35$

Bonds $$250,00010\mathrm{.}1-0\mathrm{.}15$

Loans $$300,0001-0\mathrm{.}13$

Commodities $$50,0001$

What is the bank's portfolio DEAR?

What is the difference in portfolio DEAR of all assets were pefectly correlated?