help me answer this

GENERAL DIRECTION: Answer the following questions on uncertainty and error in experimental measurement. Show your solutions completely. 1. A student records the following currents in amperes A when the potential diference V across a resistor is 12V 0.9 A 0.9 A 0.8 A 0.8 A 1.2A 0.9 A 0.8 A 0.7 A 0.8 A 0.9 A Would you disregard any of the readings? Why or why not? If so, how should the current be reported? 2. A spring balance reads 0.5 N when it is not being used. If the needle reads 9.5 N when masses are attached to it, then what would be the correct reading to record (with absolute error)? 3. Five measurements of the length of a piece of string were recorded in meters as: 1.49 1.47 1.48 1.51 1.46 How should the length of the string be recorded? 4. A metal cube has a side length of 3.00 + 0.01 cm. Calculate the volume of the cube. 5. An iron cube has sides 10.3 + 0.2 cm, and a mass of 1.3 + 0.2 g. What is the density of the cube in a-cm