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:
| No. in series | No. in season | Title | Directed by | Written by | Original air date | U.S. viewers (million) |
| --- | --- | --- | --- | --- | --- | --- |
| 25.0 | 1.0 | "Game On" | Steve Buscemi | Liz Brixius & Linda Wallem | March28,2011 | 0.61 |
| 26.0 | 2.0 | "Enough Rope" | Steve Buscemi | Liz Brixius | April4,2011 | 0.49 |
| 27.0 | 3.0 | "Play Me" | Michael Lehmann | Linda Wallem | April11,2011 | 0.57 |
| 28.0 | 4.0 | "Mitten" | Michael Lehmann | Liz Flahive | April18,2011 | 0.60 |
| 29.0 | 5.0 | "Rat Falls" | Tristram Shapeero | Alison McDonald | April25,2011 | 0.65 |
| 30.0 | 6.0 | "When the Saints Go" | Tristram Shapeero | Liz Brixius | May2,2011 | 0.53 |
| 31.0 | 7.0 | "Orchids and Salami" | Bob Balaban | Ellen Fairey | May9,2011 | 0.47 |
| 32.0 | 8.0 | "The Astonishing" | Bob Balaban | Rajiv Joseph | May16,2011 | 0.43 |
| 33.0 | 9.0 | "Have You Met Ms. Jones?" | Daisy von Scherler Mayer | Liz Brixius & Wyndham Lewis | May23,2011 | 0.60 |
| 34.0 | 10.0 | "Fuck the Lemurs" | Daisy von Scherler Mayer | Liz Brixius | June6,2011 | 0.56 |
| 35.0 | 11.0 | "Batting Practice" | Linda Wallem | Liz Flahive | June13,2011 | 0.58 |
Question:
How many episodes were written by Alison McDonald?
Answer:
1.0