Does anyone have the answers to this lab, PLEASE HELP

You are working in the lab and are working with the same element but with varying isotopes of the element. you are working with c-11, c-13, c-14, and c-15. what is the average atomic mass of this element? (use periodic table) a- 12 b-15 c-14 d-13

Fungi are classified into how many groups? a. 1 group b. 2 groups c. 3 groups d. 4 groups

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes