The black gene dominates the red gene. What F1 offspring will result from crossing a purely natural black bull with red cows?

The black gene dominates the red gene. What F1 offspring will result from crossing a purely natural black bull with red cows? What will the F2 offspring from crossing such hybrids with each other.

black suit-A, red suit-a;
1 cross (analyzing):
P1: black bull * red cow
AA * aa
G1: A; and
F1: A- black- 100%

Second cross
P2: Aa * Aa
G2: A, a; A, a
F2:
1- AA- black- 25%
2-AA- black- 50%
1- a- red suit- 25%
By phenotype: black 75%, red 25%