Please help me answer the questions

The circuit in the gure below contains a 90.0 v battery and mur capacitors. In the top paraiiei branch, there are two capacitors, one with a capacitance of c' 100 yr and another with a capacitance of 6.00 pF. In the bottom paraiiei branch, there are two more capacitors, one with a capacitance of 2.00 pr and another with a capacitance of :2 : 0.00 pF. ('i 6.00 MI: 2.00 1.1.1" + c 90.0 v Q (a) What is the equivalent capacitance (in pr) of the entire circuit? i x Which capacitors are in series, and which are in parallei? Find the equivalent capacitance for the two capacitors in series across each branch first, Then nd the equwalent capacitance of the circuit from the two parallei equivalent capacitances, pF PREVI A copper wire has a length of 37.0 m and a resistance of 3.20 0 at 20.0C. Assuming a circular cross-section, what is the wire's diameter (in mm)? The resistivity of copper at 20.0 C is 1.70 x 10-8 0 . m. X You may have expressed your answer in units of meters. Be sure to express it in units of millimeters. mm Need Help? Read ItIf a certain silver wire has a resistance of 5.10 2 at 16.0 C, what resistance will it have at 47.0.C? Need Help? Read ItThe voltage across an air-filled parallel-plate capacitor is measured to be V1 =169.0 V. When a dielectric is inserted and completely lls the space between the plates, as in the figure below, the voltage drops to V2 =49.7 V. Dielectric (a) What is the dielectric constant of the inserted material? E Can you identify the dielectric? 0 nylon O te on O neoprene rubber O bakelite 0 paper (In) If the dielectric doesn't completely fill the space between the plates, what could you conclude about the voltage across the plates