below in the picture, is a question and its answer under it. can anyone tell me the formula used in the table of the solution please. and what is CCF and how does the duration of the loan affect the answer.

thanks in advance

2 4 BB- 6 Claims on Corporate Loans & Undrawn Commitments: Bank B, a competitor to Bank A in the same jurisdiction, has a sizable loan portfolio with a particular exposure to corporations in the country and the region. Bank B understands the need for corporations to maintain back-up credit lines; consequently, not all loans granted to the different corporations are fully utilized. Bank B's loan portfolio is illustrated below: Loan Rating Authorized (in C/USD) Utilized (in C/V USD Period 1 AA- c/V USD 3,000,000 v USD 2,000,000 1 Month A+ c/v USD 4,000,000 c/V USD 4,000,000 6 Months 3 BBB c/v USD 2,000,000 c/v USD 500,000 15 Months C/V USD 2,000,000 Gv USD 1,000,000 13 Months 5 COC CIV USD 3,000,000 /v USD 2,500,000 3 Months Unrated C/V USD 1,000,000 /v USD 1,000,000 1 Month 7 Unrated CV USD 2,000,000 C/V USD 1,000,000 16 Months What is the required Risk Weighted Assets amount of Bank B's corporate portfolio? Utilized Undrawn Commitment CCF (%) RWA 1 20% c/v USD 2,000,000 V USD 1,000,000 20% c/v USD 440,000 50% c/v USD 4,000,000 V USD O 20% c/V USD 2,000,000 3 100% c/v USD 500,000 CIV USD 1,500,000 c/v USD 1,250,000 100% C/V USD 1,000,000 V USD 1,000,000 50% C/V USD 1,500,000 5 150% C/V USD 2,500,000 C/V USD 500,000 20% c/V USD 3,000,000 100% C/V USD 1,000,000 G/V USD O 20% c/v USD 1,000,000 100% c/v USD 1,000,000 C/USD 1,000,000 50% Cv USD 1,500,000 Aggregate Risk Weighted Assets on Corporate Exposures: Cv USD 11,590,000 Loan # RW 2 50% 4 6 7 AUB Exposures Risk Weights Sovereigns AAA to AA- Auto A- B88+ to BB to B- Below - Unrated Credit Assessment Risk Weights 50 100% 150% 100% Banks [Option 1] AAA to AA A+ to A- BBB+ to 000- B3+ to B- Below - Unrated Credit Assessment Risk Weights 20% 50 100M 100 150% 100% Banks tOption 2] A+ to A- 868 to BBB- BB+ to - AAA to AA- 20% Unrated Below - 150W 50W 50% 100% Credit Assessment Risk Weights Risk Weights for short terms claims 50 20 20% 20% sow 150% 20% BBB+ to Crede Assessment A+to A- AAA to AA- Below BB- Corporates B0- Unrated Risk Weights 20 50 100% 150% 100 2 4 BB- 6 Claims on Corporate Loans & Undrawn Commitments: Bank B, a competitor to Bank A in the same jurisdiction, has a sizable loan portfolio with a particular exposure to corporations in the country and the region. Bank B understands the need for corporations to maintain back-up credit lines; consequently, not all loans granted to the different corporations are fully utilized. Bank B's loan portfolio is illustrated below: Loan Rating Authorized (in C/USD) Utilized (in C/V USD Period 1 AA- c/V USD 3,000,000 v USD 2,000,000 1 Month A+ c/v USD 4,000,000 c/V USD 4,000,000 6 Months 3 BBB c/v USD 2,000,000 c/v USD 500,000 15 Months C/V USD 2,000,000 Gv USD 1,000,000 13 Months 5 COC CIV USD 3,000,000 /v USD 2,500,000 3 Months Unrated C/V USD 1,000,000 /v USD 1,000,000 1 Month 7 Unrated CV USD 2,000,000 C/V USD 1,000,000 16 Months What is the required Risk Weighted Assets amount of Bank B's corporate portfolio? Utilized Undrawn Commitment CCF (%) RWA 1 20% c/v USD 2,000,000 V USD 1,000,000 20% c/v USD 440,000 50% c/v USD 4,000,000 V USD O 20% c/V USD 2,000,000 3 100% c/v USD 500,000 CIV USD 1,500,000 c/v USD 1,250,000 100% C/V USD 1,000,000 V USD 1,000,000 50% C/V USD 1,500,000 5 150% C/V USD 2,500,000 C/V USD 500,000 20% c/V USD 3,000,000 100% C/V USD 1,000,000 G/V USD O 20% c/v USD 1,000,000 100% c/v USD 1,000,000 C/USD 1,000,000 50% Cv USD 1,500,000 Aggregate Risk Weighted Assets on Corporate Exposures: Cv USD 11,590,000 Loan # RW 2 50% 4 6 7 AUB Exposures Risk Weights Sovereigns AAA to AA- Auto A- B88+ to BB to B- Below - Unrated Credit Assessment Risk Weights 50 100% 150% 100% Banks [Option 1] AAA to AA A+ to A- BBB+ to 000- B3+ to B- Below - Unrated Credit Assessment Risk Weights 20% 50 100M 100 150% 100% Banks tOption 2] A+ to A- 868 to BBB- BB+ to - AAA to AA- 20% Unrated Below - 150W 50W 50% 100% Credit Assessment Risk Weights Risk Weights for short terms claims 50 20 20% 20% sow 150% 20% BBB+ to Crede Assessment A+to A- AAA to AA- Below BB- Corporates B0- Unrated Risk Weights 20 50 100% 150% 100