please help! i am unable to get my test to work out :(

import snakestats ERROR: test_addition_two_negative_numbers (_main_TestExample) Traceback (most recent cal1 last): File "/tmp/ipykernel 147988/3263063717,py. Iine 18, in test_addition_two_neg, x= snakestats add (1,2) TypeError: add () missing 1 required positional argument: ' c : test_adedtion_three_nurbers farain_ Testiangle j w.a ok ERROR: Test zaddition_two,negative nunbers . __main_. TestFratele) Traceback (eost recenticall last) t? x. snakestats add (tA7) Fypefrrer I adde() asissing 1 equited posithoral agppent ' 'c" Iraceback fasst recent call last) x= seakestatsiadd (2,3) Typefrxt add (y) missing 1 zequired posteiond atp ant 4 a Ran pests in b.ev5s FAILE (erroriaz) quadtest, Rain. Testriopras at exrfatsafebice. \begin{tabular}{c|c} 1 & def add (a,b): \\ 2 & x=a+b \\ 3 & return x \\ 4 & \\ 5 & def add (a,b,c)= \\ 6 & x=a+b+c \\ 7 & return x \end{tabular}