just in java

Q$1-$ Coding

Write the prefix expression that represents the following infix expression

$(\frac{a}{b})*c-(d+e)*f$

Write the following prefix expression as an infix expression

$--\frac{a}{b}+c^{*}$def

Write an algorithm to evaluate prefix expressions $($pseudocode provided with image$)$

Q$3-$ Discussion

Show a stack trace for your algorithm with an example of which prefix expression you used.