tolong jawab plsee pakai cara

s = (4y+1)

a. kll persegi = 4×s
4(4y+1)
16y+4cm

b. luas persegi = s²
(4y+1)(4y+1)
16y²+4y+4y+1
16y² +8y+1

y= 5
kll = 16y+4
(16.5)+4 = 34cm
luas = 16y²+8y+1
(16.5.5)+(8.5)+1
400 +40+1 = 441 cm²