hello heroes, I need help with this practice questions so that I may learn to do it on my own.

la. A glass rod that has been charged to + 15.0 nC touches a metal sphere. Afterward, the rod's charge is +7.00 nC. (a) What kind of charged particle was transferred between the rod and the sphere, and in which direction? (Rod to sphere or sphere to rod) (4 pts) (b) Find the number of charged particles were transferred? (6pts) 1b. Find the equivalent capacitance of the electric circuit shown in the figure. Consider the capacitance of all capacitors are equal to C= 5.00 uF. (15 pts) C 5 n B 2. (25 points). A charge -q3 is placed at a point midway between two other charges shown in the figure below. Take q3 = - 5.00 uC and consider charge q2 remains stationary under force due to qi and q3. (a) Draw a free body diagram of the forces acting on q2 due to other two charges qi and q3 (5 pts) (b) What is a condition required to make charge q2 stationary? (5pts) (c) Find the value of qi using the condition from part (b). (15 pts) + 91 -93=-5.00 HC + 92 6.00 cm 4.00 cm