Plis bantuin yg ini​

a. 2PQ + 2QR = 14

2 . 4 + 2. QR = 14

2QR = 14 – 8

2QR = 6

QR = 6/2 = 3

b. Luas Persegi panjang PQRS = PQ × QR = 4 × 3 = 12