Three experiments are conducted with identical blocks on a level, frictionless surface, as shown below. Each block starts from rest and is pushed through a distance do by a hand that exerts a constant horizontal force of magnitude Fa. lgxpcrimcm I i Experirnciu 2 i Experimem 3 Each hand pushes Each hand pushL'S Each hand pushes u'llh a consul\" force wilh a cunsrant fore: , ofmugniludc F, ' (magnum F\" With a constant force I = r of magnitude F\" In experiment 1, the blocks are connected by an ideal massless spring that is initially neither stretched nor compressed. The spring has spring constant in. At the end of the interval shown, each block has a speed of zero. In experiment 2, each block has a speed of Mfg at the end of the interval shown. In experiment 3, experiment 1 is repeated using an ideal massless spring of constant k3, which is less than k1. However, at the end of experiment 3, each block is still moving and has a speed of 170. Systems 1 and 3 consists of the two blocks and the spring in experiments 1 and 3. System 2 consists of the two blocks in experiments 2. Create four rankings according to the following quanties. from largest to smallest. If any quantity is zero, state so explicitly. Briey explain each of your rankings. i. the absolute value of the network done by external forces ii. the absolute value of the change in total energy iii. the absolute value of the change in potential energy iv. the absolute value of the change in kinetic energy