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2. If θo is the angle of elevation above the horizontal at which a projectile is launched, the horizontal component of its initial velocity is given by _______.

a. gsin(θo)

b. vocos(θo)

c. vosin(θo)

d. gcos(θo)

3. A projectile is launched at an angle of 41.1 degrees above the horizontal with an initial speed of 205 m/s and lands at the same level from which it was launched. The range is 145 meters. The time of flight is _____ m/s.

I really don't know how to work these or find the answer. If somebody could please help me!