What are the readings on the spring scales, given the markings and plunger positions? Specifically, interpret the markings and the plunger positions for each scale.

_Step 1: Analyze the spring scales to understand their markings.
Each spring scale is marked in kilograms (kg). The major markings are 0 and then a longer line in the middle, which we need to determine. There are 10 smaller intervals between 0 and this middle line.

Let's look at the first scale (a). It has a mark labeled '0' at the top. Below it, there's a longer mark, and then below that, another longer mark. The reading is indicated by the bottom of the plunger.
The first scale has '5mm' written below it, the second '8mm', the third '1mm', the fourth '3mm', and the fifth '6mm'. These 'mm' values