An object attached to a coiled spring is pulled down a distance 8 units from its rest position and then released. Assuming that the motion is simple harmonic with period T=5 seconds, write an equation that relates the displacement d of the object from its rest position after t seconds. Also assume that the direction of positive motion is up. d= cos (O (Simplify your answer. Type an exact answer, using z as needed. Use integers or fractions for any numbers in the expression.)

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

Please use attached figure, Thank you

For the First name and Surame please use the N - Z option   First name w(ab) and a(AB) are counter-clockwise   Surname: r(AB) = 500mm and angle = 30 Degrees