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:
| Tie no | Home team | Score | Away team | Attendance |
| --- | --- | --- | --- | --- |
| 1 | Barrow | 3–1 | Gateshead F.C | 551 |
| 2 | York City | 1–1 | Mansfield Town | 608 |
| York won 4–2 on penalties | York won 4–2 on penalties | York won 4–2 on penalties | York won 4–2 on penalties | York won 4–2 on penalties |
| 3 | Forest Green Rovers | 2–1 | Oxford United | 383 |
| 4 | Altrincham | 1–2 | Wrexham | 537 |
| 5 | Stafford Rangers | 1–2 | Southport | 261 |
| 6 | Bath City | 0–1 | Salisbury City | 230 |
| 7 | Weymouth | 0–3 | Torquay United | 621 |
| 8 | Woking | 3–0 | Bognor Regis Town | 480 |
| 9 | Crawley Town | 3–0 | Havant & Waterlooville | 239 |
| 10 | Eastbourne Borough | 1–3 | Ebbsfleet United | 300 |
| 11 | Hinckley United | 2–1 | Histon | 202 |
| 12 | Rushden & Diamonds | 0–3 | Stevenage Borough | 430 |
| 13 | A.F.C. Telford United | 4–3 | Cambridge United | 941 |
| 14 | Kettering Town | 4–1 | Thurrock | 438 |
| 15 | Grays Athletic | 2–4 | Chelmsford City | 262 |
| 16 | Burton Albion | 3–2 | Kidderminster Harriers | 554 |
Question:
When the Altrincham was the home team what was the tie no?
Answer:
4.0