By ammeter, which of the following can be measured

Which of the following can't be measured by sphero

Which of the following can be used as a measuring tool?

If the galvanometer current is 10 mA, resistance of the galvanometer is 40 Omega and shunt of 2 Omega is connected to the galvanometer, the maximum current which can be measured by this ammeter is

If the galvanometer current is 10 mA, resistance of the galvanometer is 40 Omega and shunt of 2 Omega is connected to the galvanometer, the maximum current which can be measured by this ammeter is

An ammeter of resistance of 0.8 Omega can measure current upto 2A. What must be the shunt resistance to enable the ammeter to measure currents up to 10 A ?