Really looking for help on this one, have been stuck on it for awhile now, thank you so much!

One kind of plant has only blue flowers and white flowers. According to a genetic model, the offsprings of a certain cross have a 60% chance to be blue-flowering, and a 40% chance to be white-flowering independently of one another. One hundred seeds of such a cross are raised, and 68 turn out to be blue-flowering. Use = 5% to test the following hypotheses: H0: = 60% vs. Ha: 60%

Note that is the population percentage of getting blue-flowering,

1) Find the observed Z-value. 2) Find P-value of the test. 3) Give a clear conclusion.