$(20$ points$)$ For each expression below $($for a to d$)$ evaluate the corresponding value.

Show your derivation, otherwise you will not get any credit. Be sure to list a value of

appropriate type $($e$.$g$.,7\mathrm{.}0$ rather than $7$ for a float, strings in quotes, etc$).$

a$)2*-5+4*3+8*-5$

b$)24\%5+32\mathrm{.}0/4\%3-15\%(16\%9)$

c$)$ str$($ int$(1)+2+3)+4+$ str$(5*6)+7$

d$)3\mathrm{.}0*4/$ int$($len$($al$))+5\%4+$ int$(4\mathrm{.}5*-2\mathrm{.}0)$