Can someone help me answer this, it's about Law of Physics. It'll be a great help! Thanks!

INSTRUCTION: Solve the following problems. Show your complete solution. Refer to the scoring guide. POINTS DESCRIPTION 5 The student provided a complete and correct answer and solution to the problem. 3 The student provided a correct answer but an incomplete solution to the problem. H The student provided an incomplete and incorrect answer and solution. 1. A stone is thrown upward with a velocity of 30 m/s. Neglecting air resistance, find: a. The maximum height it can reach b. The time it takes the stone to reach its maximum height 2. A book with a mass of 2 kg is pushed along a table. If the net force on the book is 1 N. What is the book's acceleration? 3. Calculate the momentum when a 20 kg object move with a velocity of 9 m/s east. 4. The distance between a 40 kg person and a 30 kg person is 2 m. What is the magnitude of the gravitational force each exerts on the other? (Take note: Universal gravitational constant (G) = 6.67 x 10-11 N . m2/kg?)