Mechanical engineering - strengths of materials

a pitch pine floor joist is 50mm by 250mm and 4.90 m long. what is the safe distributed dead load in kilograms per metre, the joist being braced to prevent lateral bending?

(a) 2.2 kg per metre

(b) 22.12 kg per metre

(c) 110 kg per metre

(d) 222 kg per metre

and what will the maximum deflection of the beam be ?

(a) 1 cm

(b) 10.4cm

(c) 2mm

(d) 10.4 mm