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:
| Date | Episode | Performer 1 | Performer 2 | Performer 3 | Performer 4 |
| --- | --- | --- | --- | --- | --- |
| 24 January 1992 | 1.0 | Jim Sweeney | Steve Steen | Stephen Frost | Tony Slattery |
| 31 January 1992 | 2.0 | Greg Proops | Paul Merton | Ryan Stiles | Josie Lawrence |
| 7 February 1992 | 3.0 | Jim Sweeney | Paul Merton | Steve Steen | Tony Slattery |
| 14 February 1992 | 4.0 | Jim Sweeney | Stephen Frost | Josie Lawrence | Tony Slattery |
| 21 February 1992 | 5.0 | Greg Proops | Ryan Stiles | Chip Esten | Tony Slattery |
| 28 February 1992 | 6.0 | London Compilation | London Compilation | London Compilation | London Compilation |
| 7 March 1992 | 7.0 | Greg Proops | Ryan Stiles | Colin Mochrie | Brad Sherwood |
| 14 March 1992 | 8.0 | Greg Proops | Archie Hahn | Ryan Stiles | Chip Esten |
| 21 March 1992 | 9.0 | Ron West | Ryan Stiles | Colin Mochrie | Greg Proops |
| 28 March 1992 | 10.0 | Sam Johnson | Jane Brucker | Ryan Stiles | Chip Esten |
| 3 April 1992 | 11.0 | Jim Meskimen | Christopher Smith | Ryan Stiles | Chip Esten |
| 10 April 1992 | 12.0 | Greg Proops | Ron West | Ryan Stiles | Brad Sherwood |
| 17 April 1992 | 13.0 | New York Compilation | New York Compilation | New York Compilation | New York Compilation |
Question:
What is the sum of the episode numbers where chip esten is the 4th performer and christopher smith was the 2nd performer?
Answer:
11.0