Help with those 2 please!

Many people complain that they gain weight during end of the year holidays. To determine whether this is true, researchers sampled weights in kg of 51 adults in mid-November. Then weights of these same 51 adults were recorded again in mid-January, with the following results: | Sample [lm For constructing a 90% confidence interval for the mean weight gain from mid-November to mid-January, what is the t* multiplier? 1.6759 Many people complain that they gain weight during end of the year holidays. To determine whether this is true, researchers sampled weights in kg of 51 adults in mid-November. Then weights of these same 51 adults were recorded again in mid-January, with the following results: A 90% confidence interval for the mean weight gain from mid-November to mid-January is 0.3