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Can you help me with the following two problems. Thanks so much! :)

AT&T 1:00 PM 27% O Chapter Review Exercises 209 1 15. How fast does the water level rise in the tank in Figure 9 when (a) How fast is 0 decreasing when x = 4. y = 4? the water level is h = 4 m and water pours in at 20 m /min? (b) How fast is the distance between P and @ changing when x = 4. y = 4? Hint: Use the Law of Cosines. 36 m 8 m 10 m 24 m FIGURE 10 FIGURE 9 120. A light moving at 0.8 m/s approaches a man standing 4 m from a 116. The minute hand of a clock is 8 cm long, and the hour hand wall (Figure 1 1). The light is I'm above the ground. How fast is the tip is 5 em long. How fast is the distance between the tips of the hands P of the man's shadow moving when the light is 7 m from the wall? changing at 3 o'clock? 117. Chloe and Bao are in motorboats at the center of a lake. At time 1= 0. Chloe begins traveling south at a speed of 50 km/h. One minute later. Bao takes off, heading east at a speed of 40 km/h. At what rate is the distance between them increasing at f = 12 min? 118. A bead slides down the curve xy = 10. Find the bead's horizon- tal velocity at time f = 2 s if the height of the bead at time / seconds 1.8 m is y = 400 - 16- cm. 1 m 119. In Figure 10, x is increasing at 2 cm/s, y is increasing at 3 cm/s, 4 m 0.8 m/s and e is decreasing such that the area of the triangle has the constant value 4 em". FIGURE 11 2/3