Can someone (please) help me answer G and B ? picture below v

If 20% of a number is 35, what is 50% of that number?

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?

In angle pqr find the measure of