Consider the following documents that have been created within the Bell-LaPadulasecurity model. 

The levels are: top secret (ts), secret (s), confidential (c), and unclassified (uc). 

In addition to these levels, there are the following categories: development(D), production code (PC), and software tools (T).

• Document 1: c, {D, T}

• Document 2: s, {T, PC}

• Document 3: ts, { }

• Document 4: uc, {D, T, PC}

Alice has secret clearance with access to the categories {D, T}. Determine which documents Alice can read. Determine also which documents Alice can write to.Explain your answer.