Consider the following four blocks, all of which are attached toidentical springs:

block A: mass = 200·g, spring stretched 10·cm
block B: mass = 800·g, spring stretched 20·cm
block C: mass = 400·g, spring stretched 20·cm
block D: mass = 400·g, spring stretched 20·cm.

(a) All the blocks are placed on a level surface that has nosignificant friction. For each of the following ranking tasksuse the symbols > and = to indicate your ranking (ties arepossible), listing any that are equal in alphabetical order.For example, if Y and Z are the same and are both greaterthan X, then you would enter Y=Z>X (note: Z=Y>X would beincorrect, since Y and Z, being equal, must be in alphabeticalorder). Rank the blocks, from largest to smallest, based on thepotential energy stored in the spring attached to each block.
largest PE  smallest PE

(b) The springs are released and the blocks begin to move. Rank theblocks, from largest to smallest, based on their kinetic energywhen they reach the mid-point of their oscillation (i.e., whentheir springs are unstretched)?
largest KE  smallest KE

(c) Compare the relative speed of blocks A and B when theyreach their mid-points. Choose one answer only.

speed of A > speed of Bspeed of A = speed ofB    speed of B > speed of A

(d) Compare the relative speed of blocks A and D when theyreach their mid-points. Choose one answer only.

speed of A > speed of Dspeed of A = speed ofD    speed of D > speed of A