Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Name | Release date | Latest version | Status support | Source model | Architecture | Target market |
| --- | --- | --- | --- | --- | --- | --- |
| Windows 1.0 | 1985-11-20 | 1.04 (1987-04-08) | Unsupported (2001-12-31) | Closed source | 16-bit | Desktops |
| Windows 2.0 | 1987-12-09 | 2.03 (1987-12-09) | Unsupported (2001-12-31) | Closed source | 16-bit | Desktops |
| Windows 2.1x | 1988-05-27 | 2.11 (1989-03-13) | Unsupported (2001-12-31) | Closed source | 16-bit | Desktops |
| Windows 3.0 | 1990-05-22 | 3.0a with Multimedia Extensions (1991-10-20) | Unsupported (2001-12-31) | Closed source | 16-bit | Desktops |
| Windows 3.1x | 1992-04-06 | 3.11 (1993-12-31) | Unsupported (2001-12-31) | Closed source | 16-bit* | Desktops |
Question:
Which Source model has a Release date of 1992-04-06?
Answer:
Closed source