$--$

$$answer the following questions according to this picture

The tube pattern as indicated by $"$A$"$ is what $?$

$($a$)30$ triangular

$($b$)60$ triangular

$($c$)90$ square

$($d$)45$ triangular

$2.$No$.$ of tube passes as indicated by $"$B$"$ in Fig. $18$ is what

$3.$ The location of hot fluid as indicated by $"$C$"$ in Fig. $18$ is shell side. True or Flase $?$

$4.$ The outlet temperature of tube side fluid is what in Centigrade?