validity of a proxy

Trex Gaming_67 (243 Points)

22 December 2018  
For the appointment of aperson as a proxy, will the share capital held by him effect the validity of him being a proxy
EX- Mr. X holds 6% of share capital
Mr. Y holds 1% of share capital
Mr. Z holds 5% of share capital
Mr. P holds 4% of share capital
X, Y and P wants to appoint Mr. Z as proxy
Is this proxy valid??