Could you please help me with problems 1-3 ?

During the first 13 weeks of the television season, the Saturday evening 8:00 PM to 9:00 PM audience proportions were recorded as ABC 29%, CBS 28%, NBC 25%, OTHER 18%. Two weeks after a Saturday night schedule revision, a sample of 300 homes yielded the following viewing audience data: Network ABC CBS NBC OTHER Number of Viewers 95 70 89 46 We want to test whether the viewing audience proportions changed after the schedule revision. Question 1. From the choices below select the null and alternative hypotheses for this hypothesis test. O Ho: PABC = 0.25, PCBS = 0.25, PNBC = 0.25, POTHER = 0.25; HA: the proportions are not PABC = 0.25, PCBS = 0.25, PNBC = 0.25, POTHER = 0.25 O Ho: PABC = 0.317, PCBS = 0.233, PNBC = 0.297, POTHER = 0.153; HA: the proportions are not PABC = 0.317, PCBS = 0.233, PNBC = 0.297, POTHER = 0.153. O Ho: PABC = 0.29, PCBS = 0.28, PNBC = 0.25, POTHER = 0.18; HA: the proportions are not PABC = 0.29, PCBS = 0.28, PNBC = 0.25, POTHER = 0.18. Question 2. What is the expected number of viewers for CBS if Ho is true? Question 3. In the calculation of the test statistic for this hypothesis test, what numerical value does the cell for CBS contribute to the test statistic? Question 4. If the value of the test statistic is 6.87 and the significance level is a = 0.05, what is the correct conclusion for this hypothesis test? Right click to open this chi- square table (a pdf file) in a new window. O Reject Ho and conclude that a higher proportion of viewers watch ABC since the schedule revision. O Reject Ho and conclude that a higher proportion of viewers watch NBC since the schedule revision. Do not reject Ho; we cannot conclude that the audience proportions have changed since the schedule revision