I am trying to understand why the calculating the last delay is \$max(t,mt)+2t\$. I suppose thats derived from \$max(max(t,mt), t)+t\$? But how do you extract the \$t\$ from \$max(..., t)\$ out.

![](https://i.imgur.com/d0oGo.png)

**UPDATE**

I also dont get the next part ... 

![](https://i.imgur.com/Eeaat.png)

whats m? and how is \$S\_i=max(t,mt)+t\$ and \$C\_{i+1}=max(t,mt)+2t\$ simplified to \$2t\$ and \$3t\$ respectively?