Given a bank has the following business lines with their corresponding operational risk exposure denoted by B

business line	B
1.Corporate finance	18%
2. Trading ans Sales	18%
3. Retail banking	12%
4. Commercial banking	15%
5.Payment and Settlement	18%
6.Agency services	15%
7. Asset Management	12%
8. Retail brokerage	12%

a). Explain how operational risk capital is calculated under the standardized approach .................................................................................................... [4]