A financial consultant has classified his clients according to their gender and the composition of their investment portfolio $($primarily bonds, primarily stocks, or a balanced mix of bonds and stocks$).$ The proportions of clients falling into the various categories are shown in the following table:

Portfolio Composition

Age

Bonds

Stocks

Balanced

Above $40$

$0\mathrm{.}10$

$0\mathrm{.}15$

$0\mathrm{.}10$

Below $40$

$0\mathrm{.}15$

$0\mathrm{.}25$

$0\mathrm{.}25$

Question

$1.)$ Are age and investment portfolio independent?