Ineed plz solve all 3 of these for me plz i really don't understand and my teacher is useless

Name the most appropriate metric unit for each measurement like the mass of cow

Explain why the function is discontinuous at the given number a. (select all that apply.) f(x) = 1 x + 1 a = −1 f(−1) is undefined. lim x→−1+ f(x) and lim x→−1− f(x) exist, but are not equal. lim x→−1 f(x) does not exist. f(−1) and lim x→−1 f(x) exist, but are not equal. none of the above

What are the values of each variable in the diagram below?