can you please help me to answer this and explain it???

Activity 2 Determining the Standard Form of Equation of a Parabola 1. V(0,0); F(5,0) 2. V(0,0); the parabola contains point P(2,-6) and opens downward 3. V(-2,3); F(-4,3) 4. V(3,-5); directrix is y + 8 = 0 Activity 3 Take the Challenge! The cable of a suspension bridge hangs in the shape of a parabola. The towers supporting the cable are 400 ft apart and 150 ft high. If the cable, at its lowest, is 30 ft above the bridge at its midpoint, how high is the cable 50 ft away (horizontally) from either tower? 150 (200, 150) 100 (150, ?) 50 (0, 30) -200 100 100 200