Suppose the current economy requires $$3$ million for transactions. The table below shows the interest rate and asset demand.

Interest Rate $(\%)$

Asset Demand $($in millions of Dollars$)$

$12\%$

$$3$

$10\%$

$$6$

$8\%$

$$9$

$6\%$

$$12$

$4\%$

$$15$

$2\%$

$$18$

What is the total asset demand when the interest rate is $6$ percent?