Can I get some help please

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

Aflower has 26 chromosomes. to create a new flower, how many chromosomes would a sperm cell have? what is this process called? part 2: within a flower cell that has 26 chromosomes, how many chromosomes would a cell that is created within the stem of a flower as it grows, have? what is this process called?

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.