Form of Proxy

TO CONSIDER, PURSUANT TO AN ORDER OF THE SUPREME COURT OF BRITISH COLUMBIA, AND, IF THOUGHT FIT, TO PASS, WITH OR WITHOUT VARIATION, A SPECIAL RESOLUTION (THE ARRANGEMENT RESOLUTION), APPROVING AN ARRANGEMENT (THE ARRANGEMENT), PURSUANT TO SECTION 192 OF THE CANADA BUSINESS CORPORATIONS ACT, AMONG THE CORPORATION, NGEX SHAREHOLDERS AND 17156138 CANADA INC. (SPINCO), WHICH INVOLVES, AMONG OTHER THINGS, THE CORPORATION DISTRIBUTING COMMON SHARES OF SPINCO (THE SPINCO SHARES) TO NGEX SHAREHOLDERS ON THE BASIS OF ONE-FOURTH OF A SPINCO SHARE FOR EACH COMMON SHARE OF THE CORPORATION HELD ON THE EFFECTIVE DATE OF THE ARRANGEMENT. THE FULL TEXT OF THE ARRANGEMENT RESOLUTION IS ATTACHED AS SCHEDULE A TO THE ACCOMPANYING MANAGEMENT INFORMATION CIRCULAR OF THE CORPORATION (THE CIRCULAR)

SUBJECT TO THE APPROVAL OF THE ARRANGEMENT RESOLUTION, TO CONSIDER AND, IF THOUGHT FIT, TO PASS, WITH OR WITHOUT VARIATION, AN ORDINARY RESOLUTION TO APPROVE A STOCK OPTION PLAN FOR SPINCO, AS MORE FULLY DESCRIBED IN THE CIRCULAR