1) Roland has built a circuit, and is using a device called an ammeter to measure how quickly electrical current is flowing through the circuit. He calculates that the current should be 0.1800.180 amps, but he measures the current as 0.1730.173 amps. What is Roland's percent error? 2) Two objects have masses of 1.1551.155 kg and 0.220.22 kg, respectively. Using the correct number of significant figures, what is the sum of these masses? 3) Kwame is measuring the dimensions of a box he will be using in a coming experiment. He measures the dimensions of the box as 0.8850.885 meters wide 0.200.20 meters deep, and 0.750.75 meters tall. Using the correct number of significant figures, what is the volume of this box? please try to answer as many questions as you can, thank you.