Air flows in an 8-cm-diameter, 33-m-long pipe at a velocity of 5.5 m/s. The piping system involves multiple flow restrictions with a total minor loss coefficient of 2.6. The friction factor of pipe is obtained from the Moody chart to be 0.025. The total head loss of this piping system is

(a) 13.5 m 

(b) 7.6 m 

(c) 19.9 m 

(d) 24.5 m

(e) 4.2 m