Please only write correct answers I need it asap..

A descent vehicle landing on Mars has a vertical velocity toward the surface of Mars of 5.5 m/s. At the same time, it has a horizontal velocity of 3.5 m/s.

a. At what speed does the vehicle move along its descent path?

b. At what angle with the vertical is this path?

c. If the vehicle is 230 m above the surface, how long until it reaches the surface?