Hello please answer and explain :

You are building a robot and you need a lens for its eye. The focal length of the lens must be close to 15 cm. You order three acrylic lenses and have to decide which one has the right focal length. The manufacturer's specifications give you the radii of curvature shown in Table 1.

Table 1 - Radii of curvature of lenses Surface 1 Surface 2 Type Rayon Type Rayon |R1 R2 Lentille #1 convexe 24 cm convexe 16 cm Lentille #2 convexe 28 cm convexe 28 cm Lentille #3 convexe 16 cm convexe 12 cm350 10 340 10 350 20 330 20 340 30 30 330 320 40 40 310 310 170 180 300 80 AD 150 160 190 200 210 2 220 210 200 190 180 170 100 150 140 09 DOE 290 130 280 100 110 120 TO 280 250 243 230 280 10 12 13 14 15 17 19 20 2 7 10 11 13 14 13 16 17 18 19 30 Figure 1 - Deflection of a laser beam at an incidence angle of 45 through a rectangular