| 52-109F2 - Certification of interim filings - CFO (E) | 13 Nov 2018 |  |
| 52-109F2 - Certification of interim filings - CEO (E) | 13 Nov 2018 |  |
| 52-109F2 - Certification of interim filings - CEO (E) | 14 May 2018 |  |
| 52-109F2 - Certification of interim filings - CFO (E) | 14 May 2018 |  |
| 52-109F2 - Certification of interim filings - CFO (E) | 13 Feb 2018 |  |
| 52-109F2 - Certification of interim filings - CEO (E) | 13 Feb 2018 |  |