Question quadri

Quadrilateral $P^{\text{'}}{Q}^{\text{'}}{R}^{\text{'}}{S}^{\text{'}}$ is similar to quadrilateral $PQRS$, where $P$, $Q$, $R$, and $S$ correspond to $P^{\text{'}}$, $Q^{\text{'}}$, $R^{\text{'}}$, and $S^{\text{'}}$, respectively. The measure of angle $P$ is $30°$, the measure of angle $Q$ is $50°$, and the measure of angle $R$ is $70°$. The length of each side of $P^{\text{'}}{Q}^{\text{'}}{R}^{\text{'}}{S}^{\text{'}}$ is $3$ times the length of each corresponding side of $PQRS$. What is the measure of angle $P^{\text{'}}$?