$($Capital Adequacy under Basel I$)$ National Bank has the following balance sheet

$($amount in millions$).$

$*$uninsured mortgage.

The bank also has off$-$balance sheet items including $$40$ million of Amazon

performance bonds, $$30$ million bankers' acceptance from an OECD bank and

$$20$ million forward purchase of crude oil from OECD public sector entity.

Under Basel I Accord:

$($a$)$ What is the risk$-$weighted on$-$balance$-$sheet asset? What is the risk$-$weighted

off$-$balance$-$sheet asset?

$($b$)$ What is the minimum level of total regulatory capital and Tier $1$ capital

required, respectively?

$($c$)$ What are the amounts of Tier $1$ and Tier $2$ capitals available from National

Bank, respectively? Does the bank have adequate total regulatory capital

and Tier $1$ capital?