The position of a softball tossed vertically upward is

Question

The position of a softball tossed vertically upward is described by the equation y = 7.00t - 4.90 t², where y is in meters and t in seconds.

A) Find the balls initial speed in (m/s) v₀ at t = 0?

B) Determine the velocity component v_y (in m/s) of the ball at t = 1.26 s?

C) Determine the component a_y of the acceleration (in m/s²) of the ball at t = 1.26 s?