6. A street light is mounted at the top of a 15 ft pole. A man 5 ft tall walks towards the pole at a rate of 5 ft per second. Determine how fast the length of his shadow is changing when he is 40 ft from the pole. Include a diagram with the variables being used. - 5 / 28+ / s. 7. You are given exactly 100 meters of fencing and you are to build a rectangular fenced-in corral that borders a straight river with no fencing along the river. Determine the dimensions of the corral that would create the largest possible area. Include a diagram with the variables being used. L = Som W= 75m [3] Page 3