$69.$ A $4\mathrm{.}0$ W toy motor is connected to a secondary circuit of a transformer with $60$ loops and a current of $0\mathrm{.}10$ A $.$ Find the following, if the primary voltage is $120$ V $.(6$ marks total$)$

a$)$ The voltage of the secondary circuit $(2$ marks$)$

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Physics SPH$3$U$-$B

b$)$ The number of turns in the primary coil $(2$ marks$)$

c$)$ The current in the primary coil $(2$ marks$)$