please answer 4-10 only. thank you

Activity 1.1 Null Vs Alternative Directions: State the null and the alternative hypotheses of the following statements. 1. A medical trial is conducted to test whether or not a new medicine reduces uric acid by 50%. Ho Ha: 2. We want to test whether the general average of students in Math is different from 80%. Ho: Ha 3. We want to test whether the mean height of Grade 8 students is 58 inches. Ho: Ha 4. We want to test if LPIHS students take more than four years to graduate from high school, on the average. Ho: Ha: 5. We want to test if it takes less than 60 minutes to answer the quarterly test in Calculus. Ho: Ha: 6. A medical test is conducted to determine whether or not a new vaccine reduces the complications of dengue fever. Ho: Ha 7. The enrolment in high school this school year increases by 10%. Ho Ha: 8. The intelligence quotient of male grade 11 students is the same as the female students. Ho: Ha 9. The school want to test if the students in Grade 7 prefer online distance learning as the method of instruction. Ho: Ha 10. The school librarian wants to find out if there was an increase in the number of students accessing the school library. Ho Ha