A teacher predicts what the distribution of grades on the final exam will be and they are recorded in the table below. Grade Proportion A 0.25 B 0.30 C 0.35 D 0.10 The actual distribution for a class of 20 is in the table below. Grade Frequency A 7 B 7 C 5 D 1 State the null and alternative hypotheses. H0: The observed class grades do not fit the expected grades. Ha: The observed class grades fit the expected grades. H0: The distribution of frequency for each grade is the same. Ha: The distribution of frequency for each grade is not the same. H0: The distribution of frequency for each grade is not the same. Ha: The distribution of frequency for each grade is the same. H0: The observed class grades fit the expected grades. Ha: The observed class grades do not fit the expected grades.