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:
| Constructor | Chassis | Engine | Tyre | Driver | Rounds |
| --- | --- | --- | --- | --- | --- |
| Lotus - Ford | 49B 63 | Ford Cosworth DFV 3.0 V8 | F | Graham Hill | 1-10 |
| Lotus - Ford | 49B 63 | Ford Cosworth DFV 3.0 V8 | F | Jochen Rindt | 1-2, 4-11 |
| Lotus - Ford | 49B 63 | Ford Cosworth DFV 3.0 V8 | F | Mario Andretti | 1, 7, 10 |
| Lotus - Ford | 49B 63 | Ford Cosworth DFV 3.0 V8 | F | Richard Attwood | 3 |
| Lotus - Ford | 49B 63 | Ford Cosworth DFV 3.0 V8 | F | John Miles | 5-6, 8-9, 11 |
| Lotus - Ford | 49B | Ford Cosworth DFV 3.0 V8 | F | Jo Siffert | All |
| McLaren - Ford | M7A M7C M9A | Ford Cosworth DFV 3.0 V8 | G | Denny Hulme | All |
| McLaren - Ford | M7A M7C M9A | Ford Cosworth DFV 3.0 V8 | G | Bruce McLaren | All |
| McLaren - Ford | M7A M7C M9A | Ford Cosworth DFV 3.0 V8 | G | Derek Bell | 6 |
| Matra - Ford | MS10 MS80 MS84 | Ford Cosworth DFV 3.0 V8 | D | Jackie Stewart | All |
| Matra - Ford | MS10 MS80 MS84 | Ford Cosworth DFV 3.0 V8 | D | Jean-Pierre Beltoise | All |
| Matra - Ford | MS10 MS80 MS84 | Ford Cosworth DFV 3.0 V8 | D | Johnny Servoz-Gavin | 9-11 |
| Matra - Ford | MS7 | Ford Cosworth FVA 1.6 L4 | D | Johnny Servoz-Gavin | 7 |
| Ferrari | 312 | Ferrari 255C 3.0 V12 | F | Chris Amon | 1-6 |
| Ferrari | 312 | Ferrari 255C 3.0 V12 | F | Pedro Rodríguez | 6, 8-11 |
| Ferrari | 312 | Ferrari 255C 3.0 V12 | F | Tino Brambilla | 8 |
| BRM | P138 P133 P139 | BRM P142 3.0 V12 | D | John Surtees | 1-4, 6-11 |
| BRM | P138 P133 P139 | BRM P142 3.0 V12 | D | Jackie Oliver | 1-4, 6-11 |
| BRM | P138 P133 P139 | BRM P142 3.0 V12 | D | Bill Brack | 9 |
| BRM | P138 P133 P139 | BRM P142 3.0 V12 | D | George Eaton | 10-11 |
| BRM | P126 | BRM P142 3.0 V12 | G | Pedro Rodríguez | 1-3 |
| Brabham - Ford | BT26A BT26 | Ford Cosworth DFV 3.0 V8 | G | Jack Brabham | 1-4, 8-11 |
| Brabham - Ford | BT26A BT26 | Ford Cosworth DFV 3.0 V8 | G | Jacky Ickx | All |
| Lotus - Ford | 49 | Ford Cosworth DFV 3.0 V8 | D | John Love | 1 |
| Brabham - Repco | BT24 | Repco 620 3.0 V8 | F | Sam Tingle | 1 |
| McLaren - Ford | M7A | Ford Cosworth DFV 3.0 V8 | D | Basil van Rooyen | 1 |
| Brabham - Repco | BT20 | Repco 620 3.0 V8 | G | Peter de Klerk | 1 |
| Brabham - Ford | BT26A | Ford Cosworth DFV 3.0 V8 | D | Piers Courage | 2-11 |
| Brabham - Ford | BT30 | Ford Cosworth FVA 1.6 L4 | D | Richard Attwood | 7 |
| Cooper - Maserati | T86B | Maserati 10/F1 3.0 V12 | G | Vic Elford | 3 |
| McLaren - Ford | M7B | Ford Cosworth DFV 3.0 V8 | G | Vic Elford | 4-7 |
| Brabham - Ford | BT24 | Ford Cosworth DFV 3.0 V8 | G | Silvio Moser | 3-5, 8-11 |
| Lotus - Ford | 63 49B | Ford Cosworth DFV 3.0 V8 | F | Joakim Bonnier | 6-7 |
| Brabham - Ford | BT30 | Ford Cosworth FVA 1.6 L4 | D | Kurt Ahrens, Jr. | 7 |
| Lotus - Ford | 59B | Ford Cosworth FVA 1.6 L4 | F | Hans Herrmann | 7 |
| Lotus - Ford | 59B | Ford Cosworth FVA 1.6 L4 | F | Rolf Stommelen | 7 |
| BMW | 269 | BMW M12/1 1.6 L4 | D | Hubert Hahne | 7 |
| BMW | 269 | BMW M12/1 1.6 L4 | D | Gerhard Mitter | 7 |
| BMW | 269 | BMW M12/1 1.6 L4 | D | Dieter Quester | 7 |
| Matra - Ford | MS7 | Ford Cosworth FVA 1.6 L4 | D | Henri Pescarolo | 7 |
| Tecno - Ford | TF69 | Ford Cosworth FVA 1.6 L4 | D | François Cevert | 7 |
| Brabham - Ford | BT23C | Ford Cosworth FVA 1.6 L4 | F | Xavier Perrot | 7 |
| Brabham - Ford | BT30 | Ford Cosworth FVA 1.6 L4 | F | Peter Westbury | 7 |
| Lotus - Ford | 49B | Ford Cosworth DFV 3.0 V8 | F | Pete Lovely | 9-11 |
| Brabham - Climax | BT23B | Climax FPF 2.8 L4 | D | John Cordts | 9 |
| Eagle - Climax | T1F | Climax FPF 2.8 L4 | F | Al Pease | 9 |
Question:
Which rounds did Vic Elford with a Ford cosworth dfv 3.0 v8 engine have?
Answer:
4-7