CIELAB Color Difference

Lab 5.1 CIELAB Color Difference
 
Purpose: Learn how to calculate CIELAB color difference Using CIE L*a*b*C*H* Coordinates
Procedure:
Defined by the Commission Internationale de l’Eclairage (CIE), the L*a*b* color space was modeled after a color-opponent theory stating that two colors cannot be red and green at the same time or yellow and blue at the same time. As shown below, L* indicates lightness, a* is the red/green coordinate, and b* is the yellow/blue coordinate. Deltas for L* (ΔL*), a* (Δa*) and b* (Δb*) may be positive (+) or negative ( -). The total difference, Delta E (ΔE*), however, is always positive.
ΔL* (L* sample minus L* standard) = difference in lightness and darkness (+ = lighter, – = darker)
Δa* (a* sample minus a* standard) = difference in red and green (+ = redder, – = greener)
Δb* (b* sample minus b* standard) = difference in yellow and blue (+ = yellower, – = bluer)
ΔC* (C* sample minus C* standard) = difference in chroma  (+ = Higher chroma, – = lower chroma)
There are four colors in the table below, one Standard and three batches.

Now calculate CIELAB color differences for these colors and include all highlighted lines (steps) if possible:
Lab Sample 1 vs. Standard A
Lab Sample2 vs. Standard A
Lab Sample3 vs. Standard A
 
Which batch has less color difference compare to Standard A?
Fill in the below table with all data.

Examples of calculation:
 
LAB 5.2: Compare your results of CIELAB and Calculate CMC and CIE2000 DE:
Step 1: visit the website:
http://www.brucelindbloom.com/index.html?Calc.html (Links to an external site.)
 
Step 2: Fill the table in below: