Added tasks/III.md

tasks/III.md

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+Task III - Join MSM optimisations
+
+* The codebase needs to be updated to the latest [c-kzg-4844](https://github.com/ethereum/c-kzg-4844), dependencies also needs to be upgraded;
+* The goal is to join all previous optimisations into one optimised MSM implementation. The teams need to collaborate in order to make the optimisations compatible between each other.
+* Joints MSM optimisations needs to be genereric (compatible with multiple ECC backend). If not possible - consult with supervisor.
+* Optimisations needs to be fuzzed against `go-kzg-4844` and `c-kzg-4844` with the [fuzzer](https://github.com/jtraglia/kzg-fuzz).
+* The build must pass on Github CI.
+
+Points: 2
+
+Deadline 2023-12-21
+
+----------------------------------------------------------------
+
+Each task has its deadline specified in the task that allows getting 100% of the points if done correctly. However, each late week significantly reduces the points:
+
+1 week -25%
+2 week -50%
+3 week -75%
+4 week -100%