Write a function recSymCount$()$ that computes and returns the number of math symbols in a

string provided as a parameter. The special symbols are $\text{'}+\text{'},\text{'}-\text{'},\text{'}*\text{'},\text{'}/\text{'},$ and $\text{'}=\text{'}.$ The only string

functions you are allowed to use are len$(),$ comparisons etc.$)$ and string indexing or slicing

$($e$.$g$.$ s$[$i$]$ or s$[$i:j$]$ for integers i and j$).$ The following shows several sample runs of the function:File Edit Shell Debug Options Windows Help

$$ recSymCount $(\text{'}5+4*3=?\text{'})$

$3$

$$ val $=$ recSymCount $(\text{'}$The question is: $1+2^{\text{'}})$

$$ val

$1$

$$ recSymCount $(\text{'}+3$ or $-1$ is the factor'$)$

$2$

$$ recSymCount $(\text{'}))$

$0$

$1$