Hi Zaheer,
For this delay tap sampling example , the components you are looking for are the power splitter and the electrical delay.
The power splitter can be found under default/passives library/electrical/splitters and the electrical delay can be found under Default/Tools Library/. The value of loss for the splitter can be set to 3 db by double clicking on the power splitter and putting in that value. For the electrical delay you can adjust the delay to the desired value once you double click on the block
Regards,
Joshua