My teacher laid out the problem please help me fill in the gaps

K :=8.99 . 109 .N. m C12 Problem (1) HMK Problem: You are given a chunk of copper metal. (a) How much charge is in a square block of side a :=15.0 . cm ? (b) If it takes At:=1.2 . hr for a charge to move a distance "a" what is the drift speed of the particle? (c) Using the drift speed determine the current that will flow across the block. ncop := 8.5 . 10%.m-3 de:= 1.602 . 10-19 C Acop:= a =0.023 m V con:=as =0.003 m3 ( b v : a = (3.472 - 10-5)- At (a) @cop:=ncop. de . Vcop = (4.596- 107) c (c) Iavg Qcop = (1.064 . 104 ) A At