Can someone help me with b, d and e? Please need this today

Explanation:

a) the free body diagram of the lower pulley would have two force vectors of equal magnitude acting upward and the block weight acting downward. These must balance so 2F = Wt

                                          F = 262/2 = 131 N

b) as the force needed is half of the block weight, the mechanical advantage is 262 / 131 = 2

c) with a mechanical advantage of 2, he would have to pull twice the distance of block motion or 2(3.00) = 6.00 m

d) W = Fd = 131 N(6.00 m) = 786 J

which is the same as the increase in potential energy of the block

e) W = mgh = 262(3.00) = 786 J

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there is no correct list among the choices you've provided.

the list might look something like this:

-- baby human

-- piccolo

-- flute

-- soprano singer

-- trumpet

-- tenor singer

-- trombone

-- baritone singer

-- baritone horn

-- bass singer

-- tuba

since i had to make up the list myself, i made it easy on myself, and i didn't try to shuffle the string instruments and woodwinds into it too.