Draw a schematic diagram of an electric circuit consisting of a battery of two cells each of $1.5\, V$,$5\, \Omega$,$10\, \Omega$ and $15\, \Omega$ resistors and a plug key,all connected in series.

(N/A) To construct the circuit,connect the two $1.5\, V$ cells in series to form a battery of $3\, V$.
Connect this battery in series with the three resistors of $5\, \Omega$,$10\, \Omega$,and $15\, \Omega$ and a plug key.
The schematic diagram is shown below.