Please help please please I’m failing 35 pts !

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 you could answer these your a life saver

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)