Which function is not defined at 0? Please help urgent

Answer:
b and g
Step-by-step explanation:
a. is y = 0³ = 0
b. is y = ln(0), which is undefined because ln(x) is only defined for x > 0
c. is y = 1 / (1 + e^-0) = 1 / (1 + 1) = 1/2
d. is y = 0
e. is y = 0² = 0
f. is y = sin(0) = 0
g. is y = 1/0, which is undefined because division by 0 is undefined
h. is y = e^0 = 1
i. is y = |0| = 0
j. is y = √0 = 0