1. The problem statement, all variables and given/known data The figure shows the circular wave fronts emitted by two wave sources. Make a table with rows labeled P, Q, and R and columns labeled r1, r2, [tex]\Delta[/tex]r, and C/D. Fill in the table for points P, Q, and R, giving the distances as multiples of [tex]\lambda[/tex] and indicating, with a C or a D, whether the interference at that point is constructive or destructive 2. Relevant equations no real formula, given, just count the rings in the wave front pattern 3. The attempt at a solution so i got mostly everything except r2 for P and R...im thinking it should be 7/2[tex]\lambda[/tex] for both, but apparently its not...what am i doing wrong?