Biology homework help

A 15 kg uniform disk of radius R = 0.25 m has a string wrapped around it, and a m = 4.2 kg weight is hanging on the string. The system of the weight and disk is released from rest.1)When the 4.2 kg weight is moving with a speed of 1.8 m/s, what is the kinetic energy of the entire system?K.E. =J 2)If the system started from rest, how far has the weight fallen?h fall =m 3)What is the angular acceleration at this point?? =https://www.flipitphysics.com/Content/smartPhysics/Media/Images/Phys101/08/diskwithweight.gif