genetics, i really need help! i cannot understand how to do this!?

okay guys, here are the questions. and no this is need my homework these are questions i just cannot understand ( i am studying genetics)

3. problem solving Examine the data for the crosses in cats show below. How are the black and yellow coat colors inherited? (hint: male cats are xy female cats are xx) Using a punnet square, predict the results of a cross involving a black male and a tortoise shell- female.

(info to do the problem above) (parents)

black male x yellow female

yellow male x black female

yellow male x

tortoise-shell female

(offspring)

1/2 yellow males

1/2 tortoise shell (black and yellow) females

for yellow male x black female its 1/2 black males 1/2 tortoise shell females

for yellow male x tortoise- shell females its 1/4 black males 1/4 yellow males 1/4 yellow females 1/4 tortoise shell females.