For a bridge construction project, the recommended FM for sand is $2\mathrm{.}6.$ From a market, two sand

samples $($sand$-1$ and sand$-2)$ were collected and were sent to a nearby Concrete Laboratory for

sieve analysis. The sieve analysis data are given below:

a$)$ Calculate FM of the sand samples

b$)$ Draw the grading curve of the sand samples. $($submit both graph paper plot and excel

plot$)$

c$)$ In what proportions, the sand samples are to be mixed to get the recommended FM$?$

d$)$ Comment on the samples based on the sieve analysis data and grading curves