Below is the information on the store's sales income in thousands of soles.

EFE, in its white line of household appliances. Answer each question with its procedure and answer

Year Quarter Sales

$-2017$

$1500$

$2350$

$3300$

$4400$

$-2018$

$1450$

$2250$

$3200$

$4300$

$-2019$

$1350$

$2250$

$3150$

$4400$

$-2020$

$1550$

$2350$

$3350$

$4550$

$-2022$

$1650$

$2400$

$3350$

$4650$

$-2023$

$1750$

$2500$

$3500$

$4650$

$-2024$

$1850$

a$)$ Prepare a forecast for the next quarter of $2024$ using the method of

exponential smoothing considering a $=0\mathrm{.}1$ and a $=0\mathrm{.}6$

b$)$ Calculate the MAD, MEC, MAPE and the MPE. To comment