HELSINKI (AP) — Wireless and fixed-network equipment maker Nokia on Thursday reported a smaller-than-expected profit and a double-digit fall in sales in the first quarter due to a market weakened by a lack of clients investing in 5G technology. The Espoo, Finland-based company reported a net profit of 501 million euros ($535 million) for the January-March period, up 46% from 342 million euros a year earlier. The figure was still lower than anal…