Question 4, 13.2.17 > Solve the initial value problem for r as a vector function of t. points O Points: 0 of 1 dr Differential equation: = -40k dt dr Initial conditions: r(0) = 40k and dt = 10i+10j t=0 r(t)=(10i+ 10 j+ 40 k < Question 5, 13.2.21 > points O Points: 0 of 1 Save At time t = 0, a particle is located at the point (7,5,6). It travels in a straight line to the point (1,9,3), has speed 4 at (7,5,6) and constant acceleration - 6i+4j-3k. Find an equation for the position vector r(t) of the particle at time t. The equation for the position vector r(t) of the particle at time t is r(t) = (i+Dj+0 k. (Type exact answers, using radicals as needed.)