List the types of sensors of KUKA robot KR100 titan, engineering homework help

You should watch the video
KUKA robot KR 1000 titan stacks wood overseas.rar (Attachment)
List the types of sensors that would be used to control the task shown in the video.
For each type of sensor identify where it would be used (describe the equipment) and what is the purpose of the sensor (why it is needed to control the process. This should be in the form of a list (PLEASE MAKE SURE YOU CAN ACHIEVE THE ASSIGNMENT PERFECTLY BECAUSE IT IS VERY IMPORTANT TO ME!!!)