In the preceding problem, put \(s=0\) and approach the tricritical point along the \(r\)-axis, setting \(r \approx r_{1} t\). Show that the critical exponents pertaining to the tricritical point in this model are

\[
\alpha=\frac{1}{2}, \beta=\frac{1}{4}, \gamma=1, \text { and } \delta=5
\]