QUESTION $42$ points An object moves along the $x$ axis, with its position given by the function $x(t)=\frac{1}{2}{t}^3.$ Which of the following can be obtained from a graph of $x$ vs$.t?$ a$.$ The velocity of the object at any instant in time b$.$ The average velocity of the object during as specified time interval c$.$ All of the above $q,$ d$.$ The displacement of the object during a specified time interval e$.$ The speed of the particle at any instant in time