res IS Current Grade: 0.0 / 10.0 Remaining Time: Unlimited The displacement of an object (in metres) over time is given by the following formula s(1) = -514 + 1 3/2 . where t is the time measured in seconds. (a) Find the expression for the instantaneous velocity of the object (simplify completely). Express answer with positive exponents. v(1) = BE (m/sec) (b) Find the expression for the instantaneous acceleration of the object (simplify completely). Express answer with positive exponents. a(t) = GE (m/s 2) (c) Calculate the instantaneous acceleration of the object when t = 1.1 seconds: Number ( m/s 2 ) Round your answer to 3 significant digits