C# SJCL CCM AES decryption problem to solve

I need help with decryption problem, to take inputs in file, and decrypt using inputs.
Must be using C#. .net standard 2.0 library + VSTest, along with
library for SJCL/ sjcl helpers library.
I need c# solution, within .netstandard 2.0, and a test written in VSTest showing problem being solved.
i.e. extend the unit test below.
The commented out code is javascript needing ported to c#. ie. using
SJCL available online , i.e MediusLib / SJCLHelpers.
See https://crypto.stanford.edu/sjcl/

Test method needing extended /completed is below.
Input values all below ... output should be data decoded into Json string.

[TestMethod]
public void Test_SJCL_Decode_Test1()
{
var data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
var challengeV = "eA7B0BA2B9fAECD289B9b97aCAFCBac6Abceed6fd32e14A855ED75bf5Fdac512";
var iv = challengeV.Substring(16, 16); // "89B9b97aCAFCBac6";
var adata = challengeV.Substring(32, 16); // "Abceed6fd32e14A8";
var derivedk = "5b0565d5d0e7ace1755687b1abab1a17";

//var iv = challengev.Substring(16, 16);
//var adata = challengev.Substring(32, 16);
//cipher c = new sjcl.cipher.aes(sjcl.codec.hex.toBits(derivedk));
//var pt = sjcl.mode.ccm.decrypt(c, sjcl.codec.hex.toBits(data), sjcl.codec.hex.toBits(iv),
sjcl.codec.hex.toBits(adata));
//pt = sjcl.codec.utf8String.fromBits(pt);

// pt = json string of data.
}