Read the following text carefully and answer the questions that follow:
Modern curricula include several problem-solving strategies. Teachers model the process, and students work independently to copy it. Sheela Maths teacher of class 9th wants to explain the properties of parallelograms in a creative way, so she gave students coloured paper in the shape of a quadrilateral and then ask the students to make a parallelogram from it by using paper folding
a. How can a parallelogram be formed by using paper folding?
b. If ∠RSP=30∘ , then find ∠RQP .
c. If ∠RSP=50∘ , then find ∠SPQ.