PLS help and show work. I only need help with the ODDS so 77, 79, 81, and 83 pls helppppp Thxx

VERTICAL MOTION In Exercises 77-80, use a vertical motion model tu find how long it will take for the object to reach the ground. 77. You drop keys from a window 30 feet above ground to your friend below.' ; Your friend does not catch them. 78. An acorn falls 45 feet from the top of a tree. 79. A lacrosse player throws a ball upward from her playing stick with an initial height of 7 feet, at an initial speed of 90 feet per second. 80. You throw a ball downward with an initial speed of 10 feet per second out of a window to a friend 20 feet below. Your friend does not catch the ball. 81. PEREGRINE FALCON A falcon .dives toward a pigeon on the ground. Falcon When the falcon is at a height of 100 feet the pigeon sees the falcon, which is diving at 220 feet per second. Estimate the time the pigeon 100 ft has to escape. 82. RED-TAILED HAWK A hawk . dives toward a snake. When the hawk is at a height of 200 feet the snake sees the hawk, which is diving at 105 feet per second. Estimate the time the snake has to escape. Pigeon 83. BALD EAGLE An eagle dives toward a mouse. When the eagle is at a height of 125 feet the mouse sees the eagle, which is diving at 145 feet per second. Estimate the time the mouse has to escape