QUESTION 7 "A vertical rectangular plate with a width of 18 m and a height of 13 m is located 5 m below a water (density is always 1000 kg/m^3) surface. The line of action yp (in meters, below the water surface) for the resultant hydrostatic force on this plate is (Neglect atmospheric pressure.) ?"

I asked for problems 6 and 7 to be answered, but I did not get a properly structured answered as the example shows on problem number 1. Here is the link to the questions I already had answered, could you please rewrite the answer so its properly answered as the example shows (Problem 1)?   https://www.bartleby.com/questions-and-answers/it-vivch-print-reading-for-industry-228-class-date-name-review-activity-112-for-each-local-note-or-c/cadc3f7b-2c2f-4471-842b-5a84bf505857

I am attaching both questions for 4 and 5 with the question in the image. thank you. NOTE : So the last person answered this question WITHOUT refencing the answer for whether question 4 or 5 answeres were given, so i am asking for question 5(or the answer for the question that was NOT solved because it was not referenced.) These were the following answers given to me from the last person on bartleby who answered my question without referencing whether it was the answer for question 4 or 5.  1 pass 2 fail 3 fail 4 pass

The U-tube shown in Figure Q3 (a) is rotated about one of its arms at an angular speed of o rad/s. At o = 0 rad/s, the U-tube contains 20-cm-high alcohol in both arms Q3 (a) Determine the new o when the elevation difference between the fluid surfaces in the two arms is 30 cm.