I need help with these questions pls 4 and 5 please

4. | A housefly walking across a surface may develop a sig- BIO nificant electric charge through a process similar to fric- tional charging. Suppose a fly picks up a charge of +52 pC. How many electrons does it lose to the surface it is walking across? 5. II A plastic rod that has been charged to -15.0 nC touches a metal sphere. Afterward, the rod's charge is = 10.0 nC. a. What kind of charged particle was transferred between the rod and the sphere, and in which direction? That is, did it move from the rod to the sphere or from the sphere to the rod? b. How many charged particles were transferred