计算机：已知某泵的汽蚀余量为5.3米，所打介质的比重为800kg/m³，吸入管的阻力损失为3米，求该泵的安装吸入高度为多少米。

What does the speaker think of Jack

A．He’s boasting of his own team.

B．He’s speaking ill of the speaker’s team.

C．He likes to bet money for his team.

D．He enjoys betting with the speaker.