Predict the reagents or products $(1)$ to $(5)$ in the following reaction sequence:
$p-Nitrotoluene$ $\xrightarrow{(1)} p-Toluidine$ $\xrightarrow{(CH_3CO)_2O/\text{Pyridine}} p-Acetotoluidide$ $\xrightarrow{HNO_3/H_2SO_4} (2)$ $\xrightarrow{(3)} (4)$ $\xrightarrow{(5)} 3-Nitrotoluene$

(A) The reaction sequence is as follows:
$(1)$ Reduction of $p-nitrotoluene$ to $p-toluidine$ is carried out using $Sn/HCl$.
$(2)$ Nitration of $p-acetotoluidide$ gives $2-nitro-4-methylacetanilide$ (or $4-acetamido-3-nitrotoluene$).
$(3)$ Hydrolysis of the acetamido group using $H_2O/H^+$ gives $4-amino-3-nitrotoluene$.
$(4)$ Diazotization of $4-amino-3-nitrotoluene$ using $NaNO_2/HCl$ at $0-5^{\circ}C$ gives $3-nitro-4-methylbenzenediazonium$ chloride.
$(5)$ Reduction of the diazonium salt using $H_3PO_2/H_2O$ gives $3-nitrotoluene$.