Please help explain

2. Consider the following mechanism for the formation of a double helix from its strands A and B : Step 1 . A+Bk1k1unstablehelixfastreversible Step 2. unstable helix 2 stable double helix slow. (a) Derive a rate equation for the formation of a double helix assuming Step 1 is fast and reversible. (b) Derive a rate equation for the formation of a double helix using the steady state approximation to find the concentration of the unstable helix