Hi! I'm super lost on this stats question regarding sample proportions as well as probabilities of 1/2. I need some help completing this table. Any help is appreciated and I thank you in advance!

When two births are randomly selected, the sample space for genders is bb, bg, gb, and 99. Assume that those four outcomes are equally likely. Construct a table that describes the sampling distribution of the sample proportion of girls from two births. Does the mean of the sample proportions equal the proportion of girls in two births? Does the result suggest that a sample proportion is an unbiased estimator of a population proportion? For the entire population, assume the probability of having a boy is E, the probability of having a girl is E, and this is not affected by how many boys or girls have previously been born. Determine the probabilities of each sample proportion. Sample proportion of girls Probability (Type integers or simplied fractions.)