Ten years have passed since Arnell issued $$10$ million in perpetual interest only debt with a $8\%$ annual coupon. Tax rates have remained the same at $21\%$ but interest rates have dropped, so Arnell's

current cost of debt capital is $2\%.$

a$.$ What is Arnell's annual interest tax shield?

b$.$ What is the present value of the interest tax shield today?

a$.$ What is Arnell's annual interest tax shield?

The interest tax shield is $ million. $($Round to three decimal places.$)$